2804 lines
73 KiB
Text
2804 lines
73 KiB
Text
<!DOCTYPE HTML PUBLIC "-//FreeBSD//DTD HTML 4.01 Transitional-Based Extension//EN" [
|
|
<!ENTITY base CDATA "..">
|
|
<!ENTITY date "$FreeBSD: www/en/smp/index.sgml,v 1.177 2008/08/20 21:59:45 ed Exp $">
|
|
<!ENTITY title "FreeBSD SMPng Project">
|
|
<!ENTITY email 'freebsd-smp'>
|
|
<!ENTITY % navinclude.developers "INCLUDE">
|
|
|
|
<!-- Status levels -->
|
|
<!ENTITY status.done "<font color=green>Done</font>">
|
|
<!ENTITY status.wip "<font color=blue>In progress</font>">
|
|
<!ENTITY status.stalled "<font color=purple>Stalled</font>">
|
|
<!ENTITY status.new "<font color=red>Not Started</font>">
|
|
<!ENTITY status.resolved "<font color=green>Resolved</font>">
|
|
<!ENTITY status.unresolved "<font color=red>Unresolved</font>">
|
|
|
|
<!-- The list of contributors was moved to a separate file so that it can
|
|
be used by other documents in the FreeBSD web site. -->
|
|
|
|
<!ENTITY % developers SYSTEM "../developers.sgml"> %developers;
|
|
|
|
]>
|
|
|
|
<html>
|
|
&header;
|
|
|
|
<h2>Contents</h2>
|
|
<ul>
|
|
<li><a href="#goal">Project Goal</a></li>
|
|
<li><a href="#status">Project Status</a></li>
|
|
<li><a href="#history">Project History</a></li>
|
|
<li><a href="#plan">Project Plan (Historical)</a></li>
|
|
<li><a href="#resources">Resources and Links</a></li>
|
|
<li><a href="#subsystems">Subsystems and Staffing (Historical)</a></li>
|
|
<li><a href="#status">Tasks (Historical)</a></li>
|
|
<li><a href="#issues">Known Issues (Historical)</a></li>
|
|
<li><a href="#news">News (Historical)</a></li>
|
|
</ul>
|
|
|
|
<a name="goal"></a>
|
|
<h2>Project Goal</h2>
|
|
|
|
<p>The FreeBSD Next Generation Symmetric Multi-Processing Project,
|
|
generally referred to as SMPng, had the goal of introducing parallelism
|
|
into the FreeBSD kernel.
|
|
While earlier versions of FreeBSD (3.x, 4.x) supported parallel
|
|
execution of user processes, the kernel was limited to running on a
|
|
single processor at a time, using a "Giant lock" around the kernel to
|
|
prevent more than one kernel thread or interrupt handler from executing
|
|
at once.
|
|
For many interesting workloads, Giant-locked kernels give substantial
|
|
speed-up when compared with uniprocessor systems, as significant
|
|
computation occurs in user processes--especially for applications such
|
|
as rendering and compilation.
|
|
However, for kernel-intensive applications, such as intensive network
|
|
or file system I/O, contention on the kernel lock results in little or
|
|
no speed-up.
|
|
The goal of the SMPng Project was to decompose the Giant lock into a
|
|
number of smaller locks, resulting in reduced contention (and improved
|
|
SMP performance).
|
|
Important steps along the way included redesigning significant portions
|
|
of the FreeBSD kernel architecture around the notion of ubiquitous
|
|
parallelism: that at any moment, many processors might enter the kernel
|
|
at the same time.
|
|
This included the introduction of more mature threading and
|
|
synchronization primitives, interrupt threads, cache-aware allocation
|
|
and scheduling, and topology-aware scheduling. </p>
|
|
|
|
<p>The FreeBSD Project wishes to recognize the contributions of the
|
|
BSD/OS development team, including architectural direction and
|
|
suggestions, as well as for initial locking strategies for some system
|
|
components, and source code for some of the starting primitives, not to
|
|
mention BSDI's contributions in staffing and resources for early parts
|
|
of this project. Likewise, we wish to recognize significant
|
|
sponsorship of SMPng work by Yahoo!, Isilon, and the FreeBSD
|
|
Foundation.</p>
|
|
|
|
<a name="status"></a>
|
|
<h2>Project Status</h2>
|
|
|
|
<p>While limited sections of the FreeBSD kernel still require Giant,
|
|
especially more obscure device drivers and file systems, most parts of
|
|
the kernel now neither require nor run with the Giant lock.
|
|
As of FreeBSD 6.0, the SMPng Project is considered "complete", in that
|
|
the goal of moving to parallelized kernel operation has been met for
|
|
most significant parts of the kernel.
|
|
This web page is largely historical, and is not up-to-date with respect
|
|
to the completion status of items in the task list, etc.</p>
|
|
|
|
<a name="history"></a>
|
|
<h2>Project History</h2>
|
|
|
|
<p>SMPng debuted in FreeBSD 5.0-RELEASE in January of 2003, and involved
|
|
over five years of continuous development by a large number of members
|
|
of the FreeBSD development team as well as many external contributors.
|
|
Since 5.0, the implementation has substantially matured; in the 5.0
|
|
release, the basic architectural changes required to support SMPng were
|
|
complete, including new kernel memory allocators, synchronization
|
|
routines, the move to ithreads, and the removal of the Giant lock from
|
|
activities such as process scheduling and several common forms of IPC.
|
|
Since 5.0, the architecture has been refined in a number of ways,
|
|
including optimizing synchronization approaches, stability and
|
|
performance testing on larger systems (up to 32 processor threads), and the
|
|
removal of Giant from several significant parts of the operating
|
|
system, including large parts of Virtual Memory (VM), the Virtual File
|
|
System (VFS), UNIX File System (UFS), most parts of the network stack,
|
|
including IPv4, IPV6, FAST_IPSEC, UNIX domain sockets, and NetGraph,
|
|
and also from inter-process communication primitives.
|
|
The SMP-aware kernel slab allocator is now used almost universally, and
|
|
the focus has changed from "make it work", to "optimize it".
|
|
Simultaneous work on KSE 1:1 and M:N threading has also allowed
|
|
applications to take advantage of new kernel parallelism.
|
|
The FreeBSD 5.3 kernel introduced Giant-free network stack execution
|
|
for most relevant code paths, and the FreeBSD 6.0 kernel introduced
|
|
MPSAFE VFS, as well as wide-spread performance optimization.</p>
|
|
|
|
<p>Continuing work on SMPng in the 6.x branch has included work sweeping
|
|
up the "loose ends" that remain under Giant, such as parts of NFS, and
|
|
less commonly used network stack components.</p>
|
|
|
|
<p>Throughout SMPng, an important focus was performance measurement and
|
|
optimization, which build on and refine the SMPng architecture: the
|
|
introduction of features such as the kernel trace facility (KTR),
|
|
hardware performance monitor counters (hwpmc), lock profiling, and
|
|
improved memory monitoring play important roles in this process.
|
|
Other important debugging and testing facilities include WITNESS, a
|
|
run-time kernel lock order verifier, and wide-spread use of lock
|
|
assertions and run-time invariants testing.</p>
|
|
|
|
<a name="plan"></a>
|
|
<h2>Project Plan (Historical)</h2>
|
|
|
|
<p>This web page contains information relating to the SMPng effort;
|
|
because of the immense scope of the work and rapid pace of development,
|
|
it captures only a subset of what has been done. As the base SMPng
|
|
Project, moving towards fine-grained locking, is complete, this
|
|
information is largely historical, and does not attempt to capture
|
|
more recent work on locking and multi-processor performance.</p>
|
|
|
|
<p>The task list below is not intended to be complete, but does
|
|
represent a set of relevant and/or important components of the
|
|
overall work. The "Responsible" field identifies a developer who
|
|
has expressed willingness to be responsible for completing the
|
|
identified task; this doesn't preclude others working on it,
|
|
but suggests that coordination with the responsible party might
|
|
be appropriate so as to avoid unnecessary duplication of work,
|
|
and to maximize forward progress. If beginning work on a new
|
|
area of substantial size, or one that appears unclaimed, it may
|
|
be worth dropping an e-mail to the FreeBSD SMP mailing list to
|
|
see if any progress has been made.</p>
|
|
|
|
<p>The definition of the date field varies depending on the status
|
|
of a task. For completed tasks, it refers to the date completed
|
|
or reported completed. For in-progress tasks, it refers to the
|
|
date of the last update of the entry. For stalled tasks, it
|
|
refers to the date that the task was declared stalled. For
|
|
new tasks, it refers to the date the task was added to the list.</p>
|
|
|
|
<p>Locking down of individual device drivers is tracked at
|
|
<a href="http://www.FreeBSD.org/projects/busdma/">the busdma and
|
|
SMPng driver conversion web page</a>.</p>
|
|
|
|
<p>Network stack locking information is available at &a.rwatson;'s
|
|
<a href="http://www.watson.org/~robert/freebsd/netperf/">netperf web
|
|
page</a> and the FreeBSD.org <a href="../projects/netperf/">Netperf
|
|
web page</a>.
|
|
An SMP <a href="../projects/netperf/cluster.html">network performance
|
|
cluster</a> has also been created for the purposes of testing.</p>
|
|
|
|
<p>Tasks are sorted first by status, then by date.</p>
|
|
|
|
<a name="resources"></a>
|
|
<h2>Resources and Links</h2>
|
|
|
|
<ul>
|
|
<li><p>Most SMP-related discussion takes place on the
|
|
<a href="mailto:freebsd-smp@FreeBSD.org">freebsd-smp</a>
|
|
mailing list. You can read more about mailing lists in the
|
|
<a href="../doc/en_US.ISO8859-1/books/handbook/eresources.html#ERESOURCES-MAIL">
|
|
Resources on the Internet</a> appendix of the
|
|
<a href="../doc/en_US.ISO8859-1/books/handbook/index.html">FreeBSD Handbook</a>.</p></li>
|
|
|
|
<li><p>Steve Passe has been maintaining a
|
|
<a href="http://people.FreeBSD.org/~fsmp/SMP/SMP.html">SMP
|
|
project page</a> that contains additional information, and
|
|
goes back further in time than this web page.</p></li>
|
|
|
|
<li><p>&a.rwatson; is maintaining a page for SMP-related network
|
|
performance work for the <a href="../projects/netperf/">Netperf
|
|
project</a>. In addition, he has a <a
|
|
href="http://www.watson.org/~robert/freebsd/netperf/">a personal
|
|
web page with a change log and other information</a>.</p></li>
|
|
|
|
<li><p><a href="http://www.osnews.com/">OSNews</a> has run an
|
|
interview with FreeBSD developers &a.rwatson;, &a.jhb;, and
|
|
&a.scottl;, who talk about many features in 6.x, including recent
|
|
SMPng work, SMPVFS, and more. The <a
|
|
href="http://www.osnews.com/story.php?news_id=10951">article is
|
|
here</a>.</p></li>
|
|
|
|
<li><p>A series of man pages on kernel synchronization and threading
|
|
primitives can be found here:</p>
|
|
|
|
<ul>
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=mutex&apropos=0&sektion=9">Kernel Mutexes (mutex(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=mtx_pool&apropos=0&sektion=9">Kernel Mutex Pools (mtx_pool(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=critical&apropos=0&sektion=9">Kernel Critical Sections (critical(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=sx&apropos=0&sektion=9">Kernel Shared/Exclusive Locks (sx(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=condvar&apropos=0&sektion=9">Kernel Condition Variables (condvar(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=sema&apropos=0&sektion=9">Kernel Semaphores (sema(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=sleep&apropos=0&sektion=9">Kernel sleep/wakeup API (sleep(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=kthread&apropos=0&sektion=9">Kernel Threads (kthread(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=ithread&apropos=0&sektion=9">Interrupt Threads (ithread(9))</a></li>
|
|
|
|
<li><a href="http://www.freebsd.org/cgi/man.cgi?query=swi&apropos=0&sektion=9">Software Interrupt Threads (swi(9))</a></li>
|
|
</ul>
|
|
|
|
<br>
|
|
<p>In addition, the old <a href="http://www.freebsd.org/cgi/man.cgi?query=spl&apropos=0&sektion=9">SPL man page</a> may be of interest, as it reflects the previous SMP synchronization model.</p>
|
|
</li>
|
|
|
|
<li><p>
|
|
Hiten Pandya's <a
|
|
href="http://storm.uk.FreeBSD.org/~hiten/smp_synch_rules.html">
|
|
SMP kernel synchronization rules</a>.</p></li>
|
|
|
|
<li><p>&a.dillon; maintained a
|
|
<a href="http://apollo.backplane.com/FreeBSDSmp/">web page</a>
|
|
that documented the work he was doing on the SMP project.</p></li>
|
|
|
|
<li>
|
|
<p>
|
|
<a href="http://www.usenix.org/events/bsdcon02/full_papers/baldwin/baldwin_html/index.html">
|
|
"Locking in the Multithreaded FreeBSD Kernel" USENIX paper by &a.jhb;</a>.
|
|
</p>
|
|
</li>
|
|
|
|
<li>
|
|
<p>
|
|
<a href="http://www.usenix.org/publications/library/proceedings/bsdcon03/tech/hsu.html">
|
|
"Reasoning about SMP in FreeBSD" BSDCon'03 paper by &a.hsu;</a>.
|
|
</p>
|
|
</li>
|
|
|
|
<li>
|
|
<p>
|
|
<a href="http://www.usenix.org/publications/library/proceedings/bsdcon03/tech/roberson.html">
|
|
"ULE: A Modern Scheduler for FreeBSD" BSDCon'03 paper by &a.jeff;</a>.
|
|
</p>
|
|
</li>
|
|
|
|
<li>
|
|
<p>
|
|
<a href="http://www.watson.org/~robert/freebsd/netperf/20051027-eurobsdcon2005-netperf.pdf">"Introduction to Multithreading and Multiprocessing in the FreeBSD SMPng Network Stack" EuroBSDCon 2005 paper by &a.rwatson;</a>.
|
|
</p>
|
|
</li>
|
|
|
|
</ul>
|
|
|
|
<a name="subsystems"></a>
|
|
<h2>Subsystems and Staffing (Historical)</h2>
|
|
|
|
<p>This is an incomplete list of high-level kernel subsystems and
|
|
current, active staff working on SMP architecture and stability.</p>
|
|
|
|
<table class="tblbasic">
|
|
<tr class="heading">
|
|
<th> Subsystem </th>
|
|
<th> Status </th>
|
|
<th> Last updated </th>
|
|
<th> Staffing </th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Newbus </td>
|
|
<td> &status.wip; </td>
|
|
<td> 5 October 2003 </td>
|
|
<td> &a.imp;</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> VM </td>
|
|
<td> &status.wip; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &a.alc;</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Buffer cache </td>
|
|
<td> &status.wip; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &a.jeff;, &a.phk; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> VFS </td>
|
|
<td> &status.done; </td>
|
|
<td> 24 January 2005 </td>
|
|
<td> &a.jeff; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Processes and thread operations </td>
|
|
<td> &status.wip; </td>
|
|
<td> 5 May 2003 </td>
|
|
<td> &a.jhb; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Scheduler </td>
|
|
<td> &status.done; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &a.jhb;, &a.jeff; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> GEOM </td>
|
|
<td> &status.done; </td>
|
|
<td> 5 February 2003 </td>
|
|
<td> &a.phk; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> File descriptors </td>
|
|
<td> &status.done; </td>
|
|
<td> 5 February 2003 </td>
|
|
<td> &a.alfred;, &a.tanimura;, &a.rwatson; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> TTY subsystem </td>
|
|
<td> &status.done; </td>
|
|
<td> 20 August 2008 </td>
|
|
<td> &a.ed; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Pipe IPC </td>
|
|
<td> &status.done; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &a.alfred; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Socket structures and system calls </td>
|
|
<td> &status.done; </td>
|
|
<td> 25 November 2004 </td>
|
|
<td> &a.sam;, &a.rwatson; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> KQueue </td>
|
|
<td> &status.done; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &a.jmg;, &a.green; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> IPv4 </td>
|
|
<td> &status.done; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &a.jennifer;, &a.hsu;, &a.sam;, &a.rwatson;, &a.gnn; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> IPv6 </td>
|
|
<td> &status.wip; </td>
|
|
<td> 01 July 2005 </td>
|
|
<td> &a.rwatson;, &a.gnn; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> IPX/SPX </td>
|
|
<td> &status.done; </td>
|
|
<td> 09 January 2005 </td>
|
|
<td> &a.rwatson; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> netatalk </td>
|
|
<td> &status.done; </td>
|
|
<td> 02 February 2005 </td>
|
|
<td> &a.rwatson; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Network stack infrastructure </td>
|
|
<td> &status.done; </td>
|
|
<td> 28 August 2004 </td>
|
|
<td> &a.hsu;, &a.sam;, &a.rwatson;, &a.mlaier;, &a.luigi;, Maurycy Pawlowski-Wieronski <maurycy@fouk.org>, &a.brooks;,
|
|
&a.rik; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> NFS Client </td>
|
|
<td> &status.done; </td>
|
|
<td> 19 May 2006 </td>
|
|
<td> &a.mohans; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> NFS Server </td>
|
|
<td> &status.wip; </td>
|
|
<td> 24 February 2007 </td>
|
|
<td> &a.rwatson;, &a.jeff; </td>
|
|
</tr>
|
|
|
|
</table>
|
|
|
|
<a name="status"></a>
|
|
<h2>Tasks (Historical)</h2>
|
|
|
|
<p>Following is an incomplete list of general tasks.</p>
|
|
|
|
<table class="tblbasic">
|
|
<tr class="heading">
|
|
<th> Task </th>
|
|
<th> Responsible </th>
|
|
<th> Last updated </th>
|
|
<th> Status </th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Convert the giant lock from spinning to blocking, add the
|
|
scheduler lock, add per-CPU idle processes. </td>
|
|
<td> &a.dillon; </td>
|
|
<td> 25 June 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Port the BSD/OS locking primitives (i386). </td>
|
|
<td> &a.jake; </td>
|
|
<td> 3 July 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement heavy-weight interrupt threads (i386). </td>
|
|
<td> &a.grog; </td>
|
|
<td> 3 August 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Rewrite the low level interrupt code (i386 UP). </td>
|
|
<td> &a.grog; </td>
|
|
<td> 3 August 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Demonstrated reasonable stability (self-hosted buildworld)
|
|
(i386 UP). </td>
|
|
<td> -smp developers </td>
|
|
<td> 12 August 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Port the BSD/OS locking primitives (alpha). </td>
|
|
<td> &a.dfr; </td>
|
|
<td> 24 August 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Stub out (disable) spl()s. </td>
|
|
<td> &a.grog; </td>
|
|
<td> 30 August 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Port the BSD/OS ktr code. </td>
|
|
<td> &a.grog;, &a.jhb; </td>
|
|
<td> 30 August 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Rewrite the low level interrupt code (i386 SMP). </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 1 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Demonstrated reasonable stability (self-hosted buildworld)
|
|
(i386 SMP). </td>
|
|
<td> -smp developers </td>
|
|
<td> 6 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Demonstrated reasonable stability (self-hosted buildworld)
|
|
(alpha). </td>
|
|
<td> -smp developers </td>
|
|
<td> 6 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make malloc and friends thread-safe. </td>
|
|
<td> &a.jasone; </td>
|
|
<td> 10 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement msleep(), make tsleep() an msleep() wrapper. </td>
|
|
<td> &a.jake; </td>
|
|
<td> 11 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make fxp driver thread-safe. </td>
|
|
<td> &a.cp; </td>
|
|
<td> 17 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make mbuf's thread-safe. </td>
|
|
<td> &a.bmilekic; </td>
|
|
<td> 29 September 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock manager re-work. </td>
|
|
<td> &a.jasone; </td>
|
|
<td> 3 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement heavy-weight interrupt threads (alpha). </td>
|
|
<td> &a.jhb;, &a.dfr; </td>
|
|
<td> 5 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Rewrite the low level interrupt code (alpha). </td>
|
|
<td> &a.dfr;, &a.jhb; </td>
|
|
<td> 5 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Process accounting. </td>
|
|
<td> &a.tegge;, &a.jhb; </td>
|
|
<td> 5 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make ethernet drivers thread-safe. </td>
|
|
<td> &a.wpaul; </td>
|
|
<td> 15 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make the mutex headers mostly machine-independent. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 20 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Rename SMP_DEBUG to MUTEX_DEBUG. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 20 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Give each soft interrupt its own thread. </td>
|
|
<td> &a.cp; </td>
|
|
<td> 25 October 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make sf_bufs (sendfile(2)) thread-safe. </td>
|
|
<td> &a.bmilekic; </td>
|
|
<td> 5 November 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make the witness code work correctly. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 18 November 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Split the ktr-specific code out of db_interface.c. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 15 December 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Convert the sio driver to using a spin mutex. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 18 December 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement condition variables. </td>
|
|
<td> &a.jake;, &a.jasone; </td>
|
|
<td> 15 January 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a flag to mtx_init() (MTX_RECURSE) that denotes
|
|
whether a mutex is allowed to recurse. </td>
|
|
<td> &a.bmilekic; </td>
|
|
<td> 19 January 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make the zone allocator thread-safe. </td>
|
|
<td> &a.des; </td>
|
|
<td> 21 January 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Convert simplelocks to mutexes. </td>
|
|
<td> &a.jasone; </td>
|
|
<td> 24 January 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make kernel preemptive with respect to interrupts. </td>
|
|
<td> &a.jake; </td>
|
|
<td> 31 January 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Cleanup of mutex API. </td>
|
|
<td> &a.bmilekic; </td>
|
|
<td> 8 February 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove COM_LOCK. </td>
|
|
<td> &a.markm; </td>
|
|
<td> 11 February 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Merge various scheduling classes into one run queue.
|
|
Modify scheduler to support preemptable kernel. </td>
|
|
<td> &a.jake; </td>
|
|
<td> 11 February 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make priority propagation work correctly. </td>
|
|
<td> &a.jake; </td>
|
|
<td> 11 February 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make most of the interrupt thread code MI and shared
|
|
between hardware and software interrupts. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 18 February 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add protection to struct jail and jail-related functionality. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 20 February 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement sx (shared/exclusive) locks. </td>
|
|
<td> &a.jasone; </td>
|
|
<td> 5 March 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Generalize/improve witness to handle more complex locking
|
|
primitives (mtx, sx). </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 28 March 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Convert the allproc and proctree locks from lockmgr locks
|
|
to sx locks. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 28 March 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make mbuf system use condition variables instead of
|
|
msleep()/wakeup(). </td>
|
|
<td> &a.bmilekic; </td>
|
|
<td> 2 April 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove <sys/mutex.h> includes from other kernel
|
|
headers such as <vm/vm_zone.h>, <sys/resourcevar.h>,
|
|
<sys/ucred.h>, and <sys/mbuf.h>. </td>
|
|
<td> &a.markm; </td>
|
|
<td> 15 May 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Cleanup the various mp_machdep.c's, unify various SMP
|
|
API's such as IPI delivery, etc. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 15 May 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make most of the forward_* and forwarded_* functions MI. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 15 May 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Complete the MD support for SMP on the Alpha platform.</td>
|
|
<td> &a.gallatin;, &a.dfr;, &a.jhb; </td>
|
|
<td> 15 May 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Convert select() to use condition variables. </td>
|
|
<td> &a.tanimura; </td>
|
|
<td> 15 May 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a "giant" lock around the VM subsystem. </td>
|
|
<td> &a.alfred; </td>
|
|
<td> 13 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Introduce a modified slab allocator for the mbuf subsystem. </td>
|
|
<td> &a.bmilekic; </td>
|
|
<td> 21 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a witness_assert() function to handle lock assertions. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Extend sx locks to support try lock operations. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Document KTR. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 28 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make fork_return, fork_exit, ast, and userret MI. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 29 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make sched_lock's savecrit a per-process property saved
|
|
and restored in mi_switch and initialized in fork_exit. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 30 June 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make ast() loop. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 10 August 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add upgrade/downgrade sx lock operations. </td>
|
|
<td> &a.kan;, &a.jasone; </td>
|
|
<td> 13 August 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement semaphores. </td>
|
|
<td> &a.jasone; </td>
|
|
<td> 14 August 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add support for upgrade/downgrades in witness. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 23 August 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make most of cpu_wait() and cpu_exit() MI. </td>
|
|
<td> &a.peter; </td>
|
|
<td> 9 September 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Split NFS into client and server. </td>
|
|
<td> &a.peter; </td>
|
|
<td> 18 Oct 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock taskqueues. </td>
|
|
<td> &a.arr;, &a.jhb; </td>
|
|
<td> 25 October 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a per-thread ucred reference. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 25 October 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make most of the per-CPU stuff MI. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 11 December 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make critical section saved state per-thread instead of per-lock
|
|
so that interlocking spin locks work properly. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 17 December 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Replace the APIC-specific imen_mtx with a MI-named icu_lock to
|
|
protect interrupt controllers and associated data within the kernel
|
|
for both i386 and alpha. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 20 December 2001 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Use the per-thread critical section nesting level in the mutex
|
|
and interrupt thread code to automatically determine when to not
|
|
preempt. This makes the MTX_NOSWITCH, SWI_SWITCH, and
|
|
SWI_NOSWITCH flags obsolete as the kernel will be able to figure
|
|
out the proper behavior on its own. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 5 January 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock struct filedesc and struct file. </td>
|
|
<td> &a.tanimura;, &a.alfred; </td>
|
|
<td> 12 January 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock struct pgrp, struct session, and struct sigio. </td>
|
|
<td> &a.tanimura; </td>
|
|
<td> 23 February 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock pipe implementation, but not sigio/fown, VM interactions. </td>
|
|
<td> &a.alfred; </td>
|
|
<td> 27 February 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Move to explicit reference counting for soft vnode references.
|
|
</td>
|
|
<td> &a.phk; </td>
|
|
<td> 8 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Initialize mutex pools early enough that sx locks can be used
|
|
for VM. </td>
|
|
<td> &a.green; </td>
|
|
<td> 14 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Place a global lock (sellock) around selinfo structures to fix a
|
|
variety of lock order reversals, and make select() MP-safe. </td>
|
|
<td> &a.alfred;, &a.davidc; </td>
|
|
<td> 14 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push down Giant on read, write, pread, pwrite system calls,
|
|
acquiring Giant in the per-subsystem fileop layer for sockets, VFS,
|
|
etc.</td>
|
|
<td> &a.alfred; </td>
|
|
<td> 15 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down kernel module structures. </td>
|
|
<td> &a.arr; </td>
|
|
<td> 18 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down kernel linker globals.</td>
|
|
<td> &a.arr; </td>
|
|
<td> 18 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Rewrite kernel memory allocator to be a slab allocator that
|
|
uses per-cpu caches. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 21 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Replace incorrect use of MD critical section API to disable
|
|
interrupts with a specific interrupt disable API. </td>
|
|
<td> &a.imp;, &a.dfr;, &a.benno;, &a.jhb; </td>
|
|
<td> 21 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down access to the shared p_args "process arguments"
|
|
structure through appropriate protection of that structure and
|
|
references to it. </td>
|
|
<td> &a.mini; </td>
|
|
<td> 31 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Move from flags/tsleep lock to sx locks to protect sysctl
|
|
tree from updates during sysctl operations. </td>
|
|
<td> &a.mini; </td>
|
|
<td> 1 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Create/port userland tool to manage KTR event dumps. </td>
|
|
<td> &a.jake; </td>
|
|
<td> 1 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Create MTX_SYSINIT and SX_SYSINIT macros that allow for
|
|
initializing locks that are subsystem independent. </td>
|
|
<td> &a.arr; </td>
|
|
<td> 2 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down the global securelevel variable. </td>
|
|
<td> &a.arr; </td>
|
|
<td> 2 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make grow_stack() MI. Possibly even a macro or inline. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 6 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock use of p_fd, which otherwise can result in corrupted
|
|
p_fd panics during heavy operation. Start with a global,
|
|
and move to per-proc locking. </td>
|
|
<td> &a.alfred;, &a.tanimura; </td>
|
|
<td> 8 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock struct pargs. </td>
|
|
<td> &a.mini; </td>
|
|
<td> 9 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock sysctl hierarchy. </td>
|
|
<td> &a.mini; </td>
|
|
<td> 9 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make {o,}sigreturn() MPSAFE. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 11 April 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Rewrite kernel memory allocator so that Giant is not required
|
|
for malloc() or free(). </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 2 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Replace complex shared/exclusive locking scheme in the VM
|
|
system with a purely exclusive lockmgr locking scheme, simplifying
|
|
locking and removing potential livelock/deadlock scenarios. </td>
|
|
<td> &a.green;, &a.alc; </td>
|
|
<td> 3 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push down Giant into readv/writev system calls in style of
|
|
read/write/pread/pwrite once malloc no longer requires Giant in
|
|
the handling of iovec structures for uio. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 9 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push down Giant in mprotect(), minherit(), and madvise() so
|
|
that it is no longer acquired and released directly. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 18 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Update suser() and p_can*() APIs to accept threads instead of
|
|
processes. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 18 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Broadly transition to td_ucred from p_ucred once KSE dependencies
|
|
are in place. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 18 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a witness_sleep() check to uma_zalloc() to catch code
|
|
calling malloc() or uma_zalloc() while holding non-sleepable
|
|
locks. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 20 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Optimize UP support by changing spin locks to only perform
|
|
critical section enter and exits. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 21 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make sleep mutexes spin if the current lock holder is
|
|
executing on another CPU. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 21 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add support for the IA32 pause instruction to spin loops in
|
|
locks. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 21 May 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make KTRACE write into tracefiles asynchronously. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 7 June 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove Giant from modnext(2), modfnext(2),
|
|
modstat(2),and modfind(2).</td>
|
|
<td> &a.arr; </td>
|
|
<td> 25 June 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix synchronization of TLB flushes and invlpg() on x86 SMP. </td>
|
|
<td> &a.peter; </td>
|
|
<td> 12 July 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing for mutex contention. </td>
|
|
<td> &a.iedowse; </td>
|
|
<td> 26 Augist 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make cpu_coredump MI. </td>
|
|
<td> &a.peter; </td>
|
|
<td> 7 September 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a subsystem lock to the accounting code. </td>
|
|
<td> &a.arr; </td>
|
|
<td> 11 September 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Allow KTR(9) to write trace records to alq(9) record facility.
|
|
</td>
|
|
<td> &a.jeff; </td>
|
|
<td> 22 September 2002 </tD>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Create mechanism in cdevsw structure to protect
|
|
thread-unsafe drivers. </td>
|
|
<td> &a.phk; </td>
|
|
<td> 27 September 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix SIGXPU and other #if 0'd things in mi_switch(). </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 30 September 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down TrustedBSD MAC implementation. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 11 November 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock eventhandlers. </td>
|
|
<td> &a.msmith;, &a.mini;, &a.jhb; </td>
|
|
<td> 11 March 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix PHOLD() so that it blocks to guarantee PS_INMEM. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 22 April 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix various procfs_machdep.c to not use sched_lock. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 22 April 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock all references to process credentials and remove Giant
|
|
from process credential-related system calls. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 1 May 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Merge the procsig and sigacts structures, move the new sigacts
|
|
structure out of the U-area and add appropriate locking. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 May 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove Giant from the kill() and killpg() system calls. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 May 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Enhance the mutex pool implementation to allow creation and
|
|
use of multiple, dynamically allocated pools with adjustable pool
|
|
sizes and mutex options. </td>
|
|
<td> &a.truckman; </td>
|
|
<td> 16 July 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Create mutex profiling tool for the kernel so as to measure
|
|
contention and behavior of kernel mutexes. </td>
|
|
<td> &a.eivind;, &a.des; </td>
|
|
<td> 31 March 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down linker_file_t structures in the kernel linker.</td>
|
|
<td> &a.arr; </td>
|
|
<td> 19 June 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock pipe implementation: VM optimizations. </td>
|
|
<td> </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Reimplement i386 interrupt and SMP code so that SMP kernels
|
|
work on UP boxes and SMP can be enabled in GENERIC. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 3 November 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement generic turnstiles to use when blocking on non-sleepable
|
|
locks. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 11 November 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Split witness_lock() into witness_checkorder() and
|
|
witness_lock(). witness_checkorder() would be called before
|
|
acquiring a lock to increase the changes of detecting and warning
|
|
about a reversal prior to deadlocking. witness_lock() would
|
|
simply update witness' internal state to note that a lock has
|
|
been acquired. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 24 January 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock per-process resource limits. </td>
|
|
<td> &a.mtm;, &a.jhb; </td>
|
|
<td> 4 February 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement a sleep queue abstraction to be used by both msleep()
|
|
and condition variables. This new abstraction should use a hash
|
|
table of sleep queues with a spin lock on each sleep queue chain
|
|
similar to turnstile chain locks to make sched_lock finger
|
|
grained.</td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 February 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove Giant from jail(2). </td>
|
|
<td> &a.arr;, &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add subsystem locking to NFSv2, NFSv3 server, permitting upcalls
|
|
and other network-related elements to run Giant-free. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing for UMA allocation/free events. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 05 August 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing for GEOM I/O events. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 21 October 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing for busdma events. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 October 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing for critical sections. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 07 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make the kernel fully preemptive. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock pipe implementation: sigio/fown-related evil. </td>
|
|
<td> &a.alfred; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down the SysV IPC code. </td>
|
|
<td> &a.alfred; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock contention measurement tool to measure heat of various
|
|
locks, including Giant, and permit more directed performance and
|
|
locking strategy optimization. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing to scheduler run queues. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 26 December 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Review locking strategy and correctness of VFS operations
|
|
and fix up various failure modes associated with enabling
|
|
VFS locking assertions. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 01 January 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Document in-vnode locking strategy, clean it up. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 01 January 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Run cross-file system VFS without Giant, acquiring Giant
|
|
conditionally based on a file system flag. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 01 January 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Run UFS file system MPSAFE. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 01 January 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) tracing for buffer cache events. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 24 January 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Break out critical section and spin lock APIs, and re-optimize
|
|
critical sections to not disable interrupts in hardware due to
|
|
the high cost on some hardware architectures. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 04 April 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Modify uma(9) to use critical sections to protect per-CPU
|
|
statistics, instead of mutexdes, in order to optimize access. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 29 April 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Migrate malloc(9) to per-CPU statistics, and use critical
|
|
sections to optimize access to those statistics. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 29 May 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add KTR(9) support for KTR_VFS to trace additional VFS events,
|
|
rather than mechanically inserted KTR_VOP events. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 11 June 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push the grabbing of Giant into Linux i386 ABI system calls.</td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 July 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push the grabbing of Giant into Linux AXP ABI system calls.</td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 July 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push the grabbing of Giant into SVR4 i386 ABI system calls.</td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 July 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push the grabbing of Giant into OSF/1 AXP ABI system calls.</td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 July 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push the grabbing of Giant into IBCS i386 ABI system calls.</td>
|
|
<td> &a.jhb; </td>
|
|
<td> 13 July 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a new witness check for exiting threads to verify that
|
|
an exiting thread holds no locks. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 2 September 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement atomic_fetchadd() for ints. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 September 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement a simple reference count API using atomic operations and
|
|
use this to replace locks that just protect a reference count. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 September 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Split the interrupt handler list out of struct ithread into
|
|
its own structure and only start up kthreads for interrupt
|
|
vectors that actually have threaded interrupt handlers. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 25 October 2005 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock aio(4). </td>
|
|
<td> &a.davidxu; </td>
|
|
<td> 22 January 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement reader/writer locks. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 January 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove the MPSAFE syscall flag from the syscall table. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 28 July 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add sufficient synchronization to printf to avoid printing
|
|
problems but not so much it doesn't work in debugging contexts. </td>
|
|
<td> &a.jb; </td>
|
|
<td> 1 November 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Expand mutex profiling tool to also profile sx locks. </td>
|
|
<td> &a.kmacy; </td>
|
|
<td> 11 November 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<!-- WIP -->
|
|
|
|
<tr>
|
|
<td> Lock struct proc. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 20 February 2001 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down the tty subsystem. </td>
|
|
<td> Dick Garner, Jeremy Scofield, &a.tmm;, &a.phk; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix clock locking to be the same on all platforms. </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 16 November 2001 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make use of process locking and process reference counting
|
|
to protect debugging interfaces (and procfs). </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 27 February 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make use of process locking to protect process monitoring
|
|
sysctls, including those employed by 'ps' and related tools.
|
|
<td> &a.jhb; </td>
|
|
<td> 27 February 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down newbus infrastructure to support driver
|
|
fine-graining. </td>
|
|
<td> &a.imp; </td>
|
|
<td> 28 February 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> SMPng architecture document. </td>
|
|
<td> &a.jhb;, &a.rwatson; </td>
|
|
<td> 28 February 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Move to shared lock for VOP_GETATTR() to reduce blocking during
|
|
frequent lightweight VFS operations. Modify namei() to provide
|
|
a LOOKUP_SHARED flag to indicate when the lock required may be
|
|
shared instead of exclusive. </td>
|
|
<td> &a.jeff; </td>
|
|
<td> 11 March 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Document existing vm_map locking and verify it's correctness. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 18 May 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Document existing vm_object locking and verify it's
|
|
correctness. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 4 May 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement lazy interrupt thread switching (context
|
|
stealing) on i386. </td>
|
|
<td> &a.bmilekic;, &a.kan; </td>
|
|
<td> 10 December 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Implement lazy interrupt thread switching (context
|
|
stealing) on sparc64. </td>
|
|
<td> &a.jake; </td>
|
|
<td> 10 December 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Switch from using lockmgr in VM to using a mutex or exclusive
|
|
sxlock. Push down Giant on all VM except for vm_object/VFS and
|
|
vm_page/pmap components. </td>
|
|
<td> &a.alc; </td>
|
|
<td> 10 December 2002 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Modify device driver API to permit drivers to more easily
|
|
split "in interrupt context" and "in interrupt thread"
|
|
code so as to acknowledge interrupts faster. This will permit
|
|
lower latency in interrupt handling. </td>
|
|
<td> &a.piso; </td>
|
|
<td> 24 February 2007 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<!-- Stalled -->
|
|
|
|
<!-- Not Started -->
|
|
|
|
<tr>
|
|
<td> Conditionalize atomic ops in the SMP code that are used
|
|
for debugging statistics. </td>
|
|
<td> &a.peter; </td>
|
|
<td> 15 March 2001 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Axe schedcpu() in favor of event driven priority updates as
|
|
much as possible. </td>
|
|
<td> </td>
|
|
<td> 7 September 2001 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix *hold (e.g. crhold) to return reference to object. </td>
|
|
<td> </td>
|
|
<td> 7 September 2001 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add witness checking for lockmgr locks. </td>
|
|
<td> </td>
|
|
<td> 7 September 2001 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add ICU spin locks on ia64. </td>
|
|
<td> </td>
|
|
<td> 4 January 2002 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add a witness_sleep() check to copyin/out() and s/fuword(). </td>
|
|
<td> &a.jhb; </td>
|
|
<td> 7 June 2002 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Remove Giant from mi_startup() and push Giant down into
|
|
individual SYSINIT functions. Many SYSINIT functions probably do
|
|
not need Giant anyway. </td>
|
|
<td> </td>
|
|
<td> 21 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<!--
|
|
<tr>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> D M 2002 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
-->
|
|
</table>
|
|
|
|
<p>This table lists the todo subtasks for multithreading the network
|
|
stack.</p>
|
|
|
|
<table class="tblbasic">
|
|
<tr class="heading">
|
|
<th> Task </th>
|
|
<th> Responsible </th>
|
|
<th> Last updated </th>
|
|
<th> Status </th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Protect network interface queues. </td>
|
|
<td> &a.jlemon; </td>
|
|
<td> 24 November 2000 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up IP. </td>
|
|
<td> &a.jennifer;, &a.hsu; </td>
|
|
<td> 10 June 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up TCP. </td>
|
|
<td> &a.jennifer;, &a.hsu;, &a.sam;, &a.rwatson;</td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up UDP. </td>
|
|
<td> &a.jennifer;, &a.hsu;, &a.rwatson; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock ifaddr reference counts. </td>
|
|
<td> &a.hsu; </td>
|
|
<td> 18 December 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up ifnet list. </td>
|
|
<td> &a.hsu; </td>
|
|
<td> 21 December 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock radix trees. </td>
|
|
<td> &a.hsu; </td>
|
|
<td> 23 December 2002 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up ARP. </td>
|
|
<td> &a.hsu; </td>
|
|
<td> 16 January 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up raw IP. </td>
|
|
<td> &a.sam;, &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock divert sockets. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock ipfw2. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock DUMMYNET. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock ethernet bridge. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock IP fragment queues. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock routing entries. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock FAST_IPSEC. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 4 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Permit parallel entry into isr processing. </td>
|
|
<td> &a.rwatson;, &a.sam; </td>
|
|
<td> 11 October 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock if_disc "discard interface". </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 9 March 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock if_faith "IPv6-to-IPv4 TCP relay interface. " </td>
|
|
<td> &a.sam;, &a.rwatson; </td>
|
|
<td> 9 March 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock if_gif "generic tunnel interface". </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 9 March 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Review ECN tunnel support (ip_ecn.c). </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 9 March 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> if_tap global and softc locking. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> if_tun global and softc locking. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> netatalk/aarp.c locking. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Cache socket MAC label in inpcb label for IPv4 sockets so that
|
|
the label can be used safely at the inet layer without socket
|
|
locks. </tD>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> IP encapsulation subroutines (ip_encap.c). </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock globals in loopback interface (if_loop.c). </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Use m_tags in if_gif to limit looping configurations, rather
|
|
than a non-MPSAFE static coutner. </td>
|
|
<td> &a.ru; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> netatalk DDP PCB locking. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock up syncache. </td>
|
|
<td> &a.hsu;, &a.sam; </td>
|
|
<td> 10 November 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Permit IP forwarding path to run Giant-free. </td>
|
|
<td> &a.sam; </td>
|
|
<td> 1 December 2003 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock &unix; domain protocols, fifofs. </td>
|
|
<td> &a.sam;, &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Giant lock over NFS server to protect against so_upcall() w/o Giant </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock interface cloning meta-data. </td>
|
|
<td> &a.brooks; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Apply combination of socket and socket buffer locks, label caching
|
|
to MAC labels on sockets so that they can be used safely without
|
|
Giant. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Make routing socket message dispatch use a netisr to avoid
|
|
re-entering the socket code from the routing code, resolving lock
|
|
order issues. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Introduce accept locking to protect accept incomplete and
|
|
complete queues on listen sockets. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Break out socket buffer wakeup, socket buffer append, socket
|
|
state change, socket buffer reserve, flush, etc, calls into
|
|
_locked() and unlocked versions, and avoid conditional locking.
|
|
</td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down AARP, AppleTalk Address Resolution Protocol. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix pull/push cache data synchronization issues in sosend(),
|
|
soreceive(), allowing them to run Giant-free. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Protect socket global counters/limits and generation number
|
|
with a mutex. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down unit allocation meta-data in interface related
|
|
netgraph modules. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down socket buffer OOB fields across TCP/IP, IPX. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add MSG_NBIO so that fifofs can avoid frobbing SO_NBIO in
|
|
a manner that risks races. </td>
|
|
<td> &a.truckman; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Protect all use of so_count with socket lock. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Move socket buffer related state from so_state to sb_state so
|
|
it can be properly locked by the socket buffer mutex. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Introduce a temporary global lock to lock the if_label field
|
|
used by the MAC Framework. </tD>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push VFS-specific behavior out of fdrop_locked() and acquire
|
|
Giant in the fo_close per-object methods rather than
|
|
fdrop_locked(), so that pipes and sockets can run fo_close()
|
|
Giant-free. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push Giant acquisition into fo_stat() file descriptor stat
|
|
operation, rather than acquiring it in fstat(), so that fstat()
|
|
on sockets and pipes can run Giant-free. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Don't hold socket locks over entry to protocol switch methods,
|
|
allowing protocol methods to acquire socket locks after protocol
|
|
locks in the lock order. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 July 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Port inpcb mutex locking, assertions from IPv4 to IPv6. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 8 August 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add IFF_NEEDSGIANT to allow if_start to run with Giant for
|
|
specific interfaces. Defer if_start to task queue. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 8 August 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Push down Giant in stat(), fo_stat() to allow Giant-free stat
|
|
of pipes, sockets. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 8 August 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Add TCP lock assertions. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock socket layer. </td>
|
|
<td> &a.sam;, &a.rwatson; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Review TCP timer code. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Analyze and reduce cost of entropy gathering in network critical
|
|
paths. </td>
|
|
<td> &a.rwatson;, &a.markm; </td>
|
|
<td> 24 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Allow code to declare NET_NEEDS_GIANT(), forcing Giant over the
|
|
network stack if that code is compiled into the kernel. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 28 August 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Disable Giant over the network stack in the default
|
|
configuration. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 28 August 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Additional KTR tracing for UMA, callouts, interrupts, etc. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 07 November 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Move to using file descriptor reference counts instead of
|
|
socket reference counts for socket system calls, avoiding extra
|
|
reference couht operations. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 24 October 2004 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down netnatm. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> April 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Default to direct dispatch from ithreads </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 28 November 2006 </td>
|
|
<td> &status.done; </td>
|
|
</tr>
|
|
|
|
<!-- WIP -->
|
|
|
|
<tr>
|
|
<td> Lock IPv6. </td>
|
|
<td> &a.sam;, &a.rwatson;, &a.ume;, &a.mlaier; </td>
|
|
<td> 8 August 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> if_ppp global, per-softc locking. </td>
|
|
<td> &a.rwatson;, Maurycy Pawlowski-Wieronski <maurycy@fouk.org> </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock struct ifnet. </td>
|
|
<td> &a.mlaier;, &a.luigi;, Maurycy Pawlowski-Wieronski <maurycy@fouk.org> </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock IPv4, IPv6, atalk interface address lists. </td>
|
|
<td> &a.mlaier;, &a.rwatson; </td>
|
|
<td> 8 August 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock consumers of BSD compress (bsd_comp.c) code to protect
|
|
compression state. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock global and softc state for six-to-four converter (if_stf.c). </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock down global and softc state for SLIP (if_sl.c). </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock global and softc state for SPPP (if_sppsubr.c). </td>
|
|
<td> &a.rik;, &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> IGMP locking. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 23 April 2004 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> IP ID locking. </td>
|
|
<td> &a.ups; </td>
|
|
<td> 24 June 2005 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Locking for polling(4). </td>
|
|
<td> &a.pjd;, &a.glebius; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> BPF locking needs some cleanup, there are some race conditions there relating to interface removal. </td>
|
|
<td> &a.csjp; </td>
|
|
<td> 2 June 2006 </td>
|
|
<td> &status.wip; </td>
|
|
</tr>
|
|
|
|
<!-- Not Started -->
|
|
|
|
<tr>
|
|
<td> Reduce contention upon locking a socket buffer by replacing
|
|
tsleep() and wakeup() with a condvar. </td>
|
|
<td> &a.tanimura; </td>
|
|
<td> 21 April 2002 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock if_ef "ethernet frame" driver. </td>
|
|
<td> </td>
|
|
<td> 9 March 2004 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Further cleanup of socket state machine in order to facilitate finishing socking locking of state transitions. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock KAME IPSEC. </td>
|
|
<td> </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Only one of our ATM stacks is MPSAFE, the other two should be deleted or fixed. </td>
|
|
<td> </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock ND6 (IPv6 Neighbor Discovery). </td>
|
|
<td> &a.gnn; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock IPv6 multicast address lists. </td>
|
|
<td> </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock IPv4 and IPv6 global address lists. </td>
|
|
<td> </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Continued cleanup of the stack/device driver ownership and locking for struct ifnet needs to be done. Most fields are now either locked or assigned ownership. Some fields, such as if_flags, need a bit more cleanup due to device drivers modifying stack-owned fields. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> When interfaces are torn down, there are a number of races (not all associated with SMPng) that need to be thought about. </td>
|
|
<td> </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Lock if_vlan and inter-layer multicast address manipulation and synchronization in if_vlan. </td>
|
|
<td> &a.glebius;, &a.yar; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Further investigate locking in in_gif and in6_gif. </td>
|
|
<td> </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> FAST_IPSEC and KAME IPSEC's PF_KEY support likely needs an asynchronous dispatch to prevent socket lock ordering issues similar to what was done for PF_ROUTE. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Investigate how to eliminate the use of ACCEPT_LOCK(), which currently prevents races in the tear-down of sockets. </td>
|
|
<td> &a.rwatson; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Fix SMP problems with netgraph restructuring. </td>
|
|
<td> &a.glebius; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Verify locking in netgraph nodes and improve where necessary. </td>
|
|
<td> &a.glebius; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> More finely-grained locking for pf(4). </td>
|
|
<td> &a.glebius; </td>
|
|
<td> 19 October 2005 </td>
|
|
<td> &status.new; </td>
|
|
</tr>
|
|
|
|
</table>
|
|
|
|
<a name="issues"></a>
|
|
<h2>Known Issues (Historical)</h2>
|
|
|
|
<table class="tblbasic">
|
|
<tr class="heading">
|
|
<th> Issue </th>
|
|
<th> Last updated </th>
|
|
<th> Status </th>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Idle processor time is not charged to the idle processes. </td>
|
|
<td> 20 September 2000 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> microuptime creeps backwards. </td>
|
|
<td> 4 October 2000 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> microuptime() went backwards </td>
|
|
<td> 4 October 2000 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Process accounting is not accurate (the more CPUs, the
|
|
closer to correct it is). </td>
|
|
<td> 5 October 2000 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> M_DEVBUF is probably the wrong memory pool for interrupt
|
|
stuff and we should think about creating a new malloc pool for
|
|
that stuff. </td>
|
|
<td> 9 February 2001 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> PC card eject panics due to a race condition in the
|
|
interrupt thread code. </td>
|
|
<td> 15 March 2001 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> SMP x86 boxes are seeing NCPU * 100 clk interrupts and
|
|
NCPU * 128 rtc interrupts. </td>
|
|
<td> 15 May 2001 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Witness will infinitely recurse when it acquires Giant after
|
|
sleeping with a sleepable lock. </td>
|
|
<td> 27 June 2001 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Serial gdb does not work if boot_ddb and boot_gdb options
|
|
are specified. </td>
|
|
<td> 14 July 2002 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Serial gdb does not work at 115200 baud. </td>
|
|
<td> 14 July 2002 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> Serial gdb never regains control once 'cont' has been
|
|
entered. </td>
|
|
<td> 14 July 2002 </td>
|
|
<td> &status.resolved; </td>
|
|
</tr>
|
|
|
|
<!-- unresolved -->
|
|
|
|
<tr>
|
|
<td> Profiling is broken. </td>
|
|
<td> 20 February 2001 </td>
|
|
<td> &status.unresolved; </td>
|
|
</tr>
|
|
|
|
<!--
|
|
<tr>
|
|
<td> </td>
|
|
<td> D M 2002 </td>
|
|
<td> &status.unresolved; </td>
|
|
</tr>
|
|
|
|
-->
|
|
</table>
|
|
|
|
<a name="news"></a>
|
|
<h2>News (Historical)</h2>
|
|
|
|
<p>The remainder of this page is structured as a
|
|
reverse-chronological log.</p>
|
|
|
|
<!--
|
|
<b> D M 2002</b>
|
|
<ul>
|
|
<li> <p> </p> </li>
|
|
</ul>
|
|
-->
|
|
<b>28 August 2004</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.rwatson; threw the switch to change the network stack to run
|
|
without the Giant lock by default, permitting the network stack to be
|
|
run on multiple CPUs at a time, as well as to preempt and be
|
|
preempted by other code.</p>
|
|
</li>
|
|
</ul>
|
|
<b>30 October 2003</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.grog; submitted a
|
|
<a href="http://www.lemis.com/grog/SMPng/Singapore/">FreeBSD SMPng paper</a>
|
|
to the <a href="http://www.aeosc.org/">Asian Enterprise Open Source
|
|
Conference</a> in Singapore. The paper presents a historical view of
|
|
SMPng development through 2001, but omits discussion of more recent
|
|
progress on the SMPng project, such as substantial performance enhancements
|
|
resulting from extensive lock pushdown in the storage subsystem, VM
|
|
subsystem, and major IPC subsystems.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>13 January 2002</b>
|
|
<ul>
|
|
<li>
|
|
<p>A <a href =
|
|
"http://docs.FreeBSD.org/cgi/getmsg.cgi?fetch=122646+0+archive/2002/freebsd-smp/20020113.freebsd-smp">
|
|
status report</a> was sent to the -smp mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>15 May 2001</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.grog; has made his <a href =
|
|
"http://www.lemis.com/~grog/SMPng/USENIX/">USENIX paper</a> available,
|
|
which he will present in Boston at the end of June.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>22 March 2001</b>
|
|
<ul>
|
|
<li>
|
|
<p>A <a href =
|
|
"http://docs.FreeBSD.org/cgi/getmsg.cgi?fetch=41302+0+archive/2001/freebsd-smp/20010325.freebsd-smp">
|
|
status report</a> was sent to the -smp mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>5 March 2001</b>
|
|
<ul>
|
|
<li>
|
|
<p>A <a href =
|
|
"http://docs.FreeBSD.org/cgi/getmsg.cgi?fetch=0+0+archive/2001/freebsd-smp/20010311.freebsd-smp">
|
|
status report</a> was sent to the -smp mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>24 January 2001</b>
|
|
<ul>
|
|
<li>
|
|
<p>A <a href =
|
|
"http://docs.FreeBSD.org/cgi/getmsg.cgi?fetch=38125+0+archive/2001/freebsd-smp/20010128.freebsd-smp">
|
|
status report</a> was sent to the -smp mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>12 January 2001</b>
|
|
<ul>
|
|
<li>
|
|
<p>A <a href =
|
|
"http://www.FreeBSD.org/cgi/getmsg.cgi?fetch=45111+48223+/usr/local/www/db/text/2001/freebsd-smp/20010114.freebsd-smp">
|
|
status report</a> was sent to the -smp mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>11 October 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.jhb; and &a.cp; came up with a preliminary list of
|
|
<a href="http://storm.uk.FreeBSD.org/~hiten/smp_synch_rules.html">rules
|
|
</a> that should be followed when working on kernel
|
|
synchronization.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>6 September 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>The SMP code has been committed. All further work is being
|
|
done in cvs rather than with patches.</p>
|
|
</li>
|
|
|
|
<li>
|
|
<p>An updated <a
|
|
href="http://people.FreeBSD.org/~jasone/smp/smpng_patch_9.7">patch</a>
|
|
is available for download. This patch is probably what will
|
|
actually get committed.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>5 September 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>An updated <a
|
|
href="http://people.FreeBSD.org/~jasone/smp/smpng_patch_9.1">patch</a>
|
|
is available for download. This patch makes rtc a fast
|
|
interrupt, uses locked instructions for mutexes in MP kernels,
|
|
and corrects mtx_*() linkage within modules.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>1 September 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>The code is working for the most part now on i386 (UP and MP).
|
|
Some additional coding is still necessary for the alpha,
|
|
which is being done now.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>30 August 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>Updated patches for i386 and alpha are available <a href =
|
|
"http://people.FreeBSD.org/~jasone/smp/smpng_patch8.6">here</a>.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>12 August 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>Updated patches for i386 are available <a href =
|
|
"http://www.FreeBSD.org/~jhb/patches/smpng.patch6">here</a>.
|
|
Process accounting still doesn't work correctly, but a number
|
|
of other improvements have been made.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>3 August 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>Patches with functional heavy-weight threads for the i386
|
|
platform are available <a href =
|
|
"http://people.FreeBSD.org/~grog/patches4.gz">here</a>.
|
|
There are a couple of minor issues with this patch set.
|
|
Specifically, process accounting doesn't work correctly.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>6 July 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>Sheldon Hearn has prepared a mutex(9) man page based on the
|
|
BSD/OS one, which is available <a href =
|
|
"http://people.FreeBSD.org/~jake/mutex.9">here</a>.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>5 July 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.jake; put an updated patch <a href =
|
|
"http://people.FreeBSD.org/~jake/smpng.diff">here</a>.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>3 July 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.jake; has the BSD/OS lock code working now, and has
|
|
incorporated the pertinent portions of &a.dillon;'s patches
|
|
(idle processes, some of the schedlock changes, etc.).
|
|
His patch set is available <a href =
|
|
"http://people.FreeBSD.org/~jake/smpng2.tar">here</a>.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>26 June 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>&a.cp; has provided the PostScript versions of his
|
|
presentation slides for the
|
|
<a href="http://people.FreeBSD.org/~jasone/smp/smp_meeting_slides_1.ps">first day</a> and
|
|
<a href="http://people.FreeBSD.org/~jasone/smp/smp_meeting_slides_2.ps">second day</a> of the
|
|
SMP meeting.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>25 June 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>Here's a copy of the
|
|
<a href="http://docs.FreeBSD.org/cgi/getmsg.cgi?fetch=226208+0+archive/2000/freebsd-smp/20000625.freebsd-smp">SMP meeting summary</a>
|
|
that was posted to the -smp mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
<b>19 June 2000</b>
|
|
<ul>
|
|
<li>
|
|
<p>Here's a copy of the
|
|
<a href="http://docs.FreeBSD.org/cgi/getmsg.cgi?fetch=154884+0+archive/2000/freebsd-current/20000625.freebsd-current">SMP project announcement</a>
|
|
that was posted to the -current mailing list.</p>
|
|
</li>
|
|
</ul>
|
|
|
|
&footer;
|
|
</body>
|
|
</html>
|