Date: Wed, 30 Mar 2005 05:40:02 +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/vm vm_object.c Message-ID: <200503300540.j2U5e2kF005686@repoman.freebsd.org>
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alc 2005-03-30 05:40:02 UTC
FreeBSD src repository
Modified files:
sys/vm vm_object.c
Log:
Eliminate (now) unnecessary acquisition and release of the global page
queues lock in vm_object_backing_scan(). Updates to the page's PG_BUSY
flag and busy field are synchronized by the containing object's lock.
Testing the page's hold_count and wire_count in vm_object_backing_scan()'s
OBSC_COLLAPSE_NOWAIT case is unnecessary. There is no reason why the held
or wired pages cannot be migrated to the shadow object.
Reviewed by: tegge
Revision Changes Path
1.347 +1 -5 src/sys/vm/vm_object.c
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