Date: Mon, 5 Nov 2001 10:48:54 -0800 (PST) From: Matt Dillon <dillon@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/md md.c src/sys/kern vfs_bio.c vfs_cluster.c src/sys/nfsclient nfs_bio.c src/sys/sys buf.h vnode.h src/sys/ufs/ufs ufs_readwrite.c Message-ID: <200111051848.fA5ImsJ76554@freefall.freebsd.org>
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dillon 2001/11/05 10:48:54 PST
Modified files:
sys/dev/md md.c
sys/kern vfs_bio.c vfs_cluster.c
sys/nfsclient nfs_bio.c
sys/sys buf.h vnode.h
sys/ufs/ufs ufs_readwrite.c
Log:
Implement IO_NOWDRAIN and B_NOWDRAIN - prevents the buffer cache from blocking
in wdrain during a write. This flag needs to be used in devices whos
strategy routines turn-around and issue another high level I/O, such as
when MD turns around and issues a VOP_WRITE to vnode backing store, in order
to avoid deadlocking the dirty buffer draining code.
Remove a vprintf() warning from MD when the backing vnode is found to be
in-use. The syncer of buf_daemon could be flushing the backing vnode at
the time of an MD operation so the warning is not correct.
MFC after: 1 week
Revision Changes Path
1.48 +8 -5 src/sys/dev/md/md.c
1.292 +9 -4 src/sys/kern/vfs_bio.c
1.115 +1 -1 src/sys/kern/vfs_cluster.c
1.103 +7 -1 src/sys/nfsclient/nfs_bio.c
1.122 +7 -2 src/sys/sys/buf.h
1.163 +1 -0 src/sys/sys/vnode.h
1.83 +3 -1 src/sys/ufs/ufs/ufs_readwrite.c
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