Date: Sat, 1 Apr 2000 16:55:34 -0800 (PST) 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: <200004020055.QAA37741@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
dillon 2000/04/01 16:55:31 PST
Modified files:
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:
Change the write-behind code to take more care when starting
async I/O's. The sequential read heuristic has been extended to
cover writes as well. We continue to call cluster_write() normally,
thus blocks in the file will still be reallocated for large (but still
random) I/O's, but I/O will only be initiated for truely sequential
writes.
This solves a number of annoying situations, especially with DBM (hash
method) writes, and also has the side effect of fixing a number of
(stupid) benchmarks.
Reviewed-by: mckusick
Revision Changes Path
1.19 +4 -2 src/sys/gnu/ext2fs/ext2_readwrite.c
1.94 +30 -9 src/sys/kern/vfs_cluster.c
1.88 +37 -28 src/sys/kern/vfs_vnops.c
1.91 +2 -2 src/sys/sys/buf.h
1.23 +3 -3 src/sys/sys/file.h
1.112 +3 -2 src/sys/sys/vnode.h
1.66 +4 -2 src/sys/ufs/ufs/ufs_readwrite.c
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200004020055.QAA37741>