Date: Sun, 8 Feb 2009 20:23:46 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/vm vm_fault.c vnode_pager.c vnode_pager.h Message-ID: <200902082023.n18KNnoJ022140@repoman.freebsd.org>
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kib 2009-02-08 20:23:46 UTC
FreeBSD src repository
Modified files:
sys/vm vm_fault.c vnode_pager.c vnode_pager.h
Log:
SVN rev 188331 on 2009-02-08 20:23:46Z by kib
Do not sleep for vnode lock while holding map lock in vm_fault. Try to
acquire vnode lock for OBJT_VNODE object after map lock is dropped.
Because we have the busy page(s) in the object, sleeping there would
result in deadlock with vnode resize. Try to get lock without sleeping,
and, if the attempt failed, drop the state, lock the vnode, and restart
the fault handler from the start with already locked vnode.
Because the vnode_pager_lock() function is inlined in vm_fault(),
axe it.
Based on suggestion by: alc
Reviewed by: tegge, alc
Tested by: pho
Revision Changes Path
1.243 +80 -43 src/sys/vm/vm_fault.c
1.247 +0 -53 src/sys/vm/vnode_pager.c
1.21 +0 -1 src/sys/vm/vnode_pager.h
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