Date: Tue, 27 Jun 2006 05:05:06 +0000 (UTC) From: Alan Cox <alc@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/ia64/ia64 pmap.c Message-ID: <200606270505.k5R556dP087082@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
alc 2006-06-27 05:05:05 UTC
FreeBSD src repository
Modified files:
sys/ia64/ia64 pmap.c
Log:
Make several changes to pmap_enter_quick_locked():
1. Make the caller responsible for performing pmap_install(). This reduces
the number of times that pmap_install() is performed by
pmap_enter_object() from twice per page to twice overall.
2. Don't block if pmap_find_pte() is unable to allocate a PTE. If it did
block, then it might wind up mapping a cache page. Specifically, if
pmap_enter_quick_locked() slept when called from pmap_enter_object(), the
page daemon could change an active or inactive page into a cache page just
before it was to be mapped.
3. Bail out of pmap_enter_quick_locked() if pv entries aren't plentiful.
In other words, don't force the allocation of a pv entry if they aren't
readily available.
Reviewed by: marcel@
Revision Changes Path
1.177 +39 -20 src/sys/ia64/ia64/pmap.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200606270505.k5R556dP087082>