Date: Wed, 26 Apr 2000 13:36:37 -0700 (PDT) From: Matt Dillon <dillon@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/gnu/ext2fs ext2_readwrite.c src/sys/kern vfs_cluster.c vfs_vnops.c src/sys/sys buf.h file.h vnode.h src/sys/ufs/ufs ufs_readwrite.c Message-ID: <200004262036.NAA81630@freefall.freebsd.org>
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dillon 2000/04/26 13:36:37 PDT
Modified files: (Branch: RELENG_4)
sys/gnu/ext2fs ext2_readwrite.c
sys/kern vfs_cluster.c vfs_vnops.c
sys/sys buf.h file.h vnode.h
sys/ufs/ufs ufs_readwrite.c
Log:
MFC sequential write detection heuristic. This extends the sequential
read heuristic to also cover sequential writes, causing write-behind
to be used only for the sequential write case. This solves a number of
performance issues with random writes to medium sized files using
large block sizes, as occurs with DBM files.
Revision Changes Path
1.18.2.1 +4 -2 src/sys/gnu/ext2fs/ext2_readwrite.c
1.92.2.1 +30 -9 src/sys/kern/vfs_cluster.c
1.87.2.1 +39 -28 src/sys/kern/vfs_vnops.c
1.88.2.1 +2 -2 src/sys/sys/buf.h
1.22.2.1 +3 -3 src/sys/sys/file.h
1.111.2.1 +3 -2 src/sys/sys/vnode.h
1.65.2.1 +4 -2 src/sys/ufs/ufs/ufs_readwrite.c
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