Date: Fri, 21 Jan 2000 12:17:02 -0800 (PST) From: Matt Dillon <dillon@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/vm vm_map.c Message-ID: <200001212017.MAA02933@freefall.freebsd.org>
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dillon 2000/01/21 12:17:02 PST
Modified files:
sys/vm vm_map.c
Log:
Fix a deadlock between msync(..., MS_INVALIDATE) and vm_fault. The
invalidation code cannot wait for paging to complete while holding a
vnode lock, so we don't wait. Instead we simply allow the lower level
code to simply block on any busy pages it encounters. I think Yahoo
may be the only entity in the entire world that actually uses this
msync feature :-).
Bug reported by: Paul Saab <paul@mu.org>
Revision Changes Path
1.185 +30 -26 src/sys/vm/vm_map.c
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