Date: Fri, 30 Nov 2007 07:14:42 +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/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c Message-ID: <200711300714.lAU7Ehk0099456@repoman.freebsd.org>
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alc 2007-11-30 07:14:42 UTC
FreeBSD src repository
Modified files:
sys/amd64/amd64 pmap.c
sys/i386/i386 pmap.c
Log:
Improve get_pv_entry()'s handling of low-memory conditions. After page
allocation fails and pv entries are reclaimed, there may be an unused pv
entry in a pv chunk that survived the reclamation. However, previously,
after reclamation, get_pv_entry() did not look for an unused pv entry in
a surviving pv chunk; it simply retried the page allocation. Now, it
does look for an unused pv entry before retrying the page allocation.
Note: This only applies to RELENG_7. Earlier branches use a different
pv entry allocator.
MFC after: 6 weeks
Revision Changes Path
1.596 +14 -12 src/sys/amd64/amd64/pmap.c
1.600 +21 -31 src/sys/i386/i386/pmap.c
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