os/doc
3
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Regen from r191705.

Browse source
This commit is contained in:
Hiroki Sato 2009-04-30 21:37:30 +00:00
parent 26d992d263
commit 5adbf613f1
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/www/; revision=34169
1 changed files with 7 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
en/releases/7.2R/relnotes-detailed.html
View file

@ -20,7 +20,7 @@ alink="#0000FF">
2008, 2009 The FreeBSD Documentation Project</p>
<p class="PUBDATE">$FreeBSD: releng/7.2/release/doc/en_US.ISO8859-1/relnotes/article.sgml
191669 2009-04-29 17:50:48Z hrs $<br />
191705 2009-04-30 21:20:09Z hrs $<br />
</p>
<div class="LEGALNOTICE"><a id="TRADEMARKS" name="TRADEMARKS"></a>
@ -349,12 +349,12 @@ nodes have a flag to tag themselves as MPSAFE now.</p>
<p>The FreeBSD 32-bit system call translation layer now supports installing 32-bit system
calls for <tt class="LITERAL">VFS_AIO</tt>.</p>
<p>[amd64, i386] The FreeBSD virtual memory subsystem now supports <b
class="APPLICATION">Superpages</b>. The <b class="APPLICATION">Superpages</b> is a
feature that enables each entry in the TLB (translation lookaside buffer) to map a large
physical memory region into a virtual address space in modern CPUs. This provides
possible memory savings for applications that share large amounts of memory between the
address spaces and performance improvements due to fewer TLB misses. This is disabled by
<p>[amd64, i386] The FreeBSD virtual memory subsystem now supports fully transparent use
of <b class="APPLICATION">superpages</b> for application memory; application memory pages
are dynamically promoted to or demoted from superpages without any modification to
application code. This change offers the benefit of large page sizes such as improved
virtual memory efficiency and reduced TLB (translation lookaside buffer) misses without
downsides like application changes and virtual memory inflexibility. This is disabled by
default and can be enabled by setting a loader tunable <code
class="VARNAME">vm.pmap.pg_ps_enabled</code> to <tt class="LITERAL">1</tt>.</p>