CVS commit: [netbsd-5] src/sys/ufs

["Jeff Rizzo" <riz%netbsd.org@localhost>]

Module Name:    src
Committed By:   riz
Date:           Sat May 19 17:28:29 UTC 2012

Modified Files:
        src/sys/ufs/lfs [netbsd-5]: lfs_vnops.c
        src/sys/ufs/ufs [netbsd-5]: inode.h ufs_extern.h ufs_lookup.c
            ufs_vnops.c ufs_wapbl.c

Log Message:
Apply patch (requested by buhrow in ticket #1759):

sys/ufs/lfs/lfs_vnops.c                         patch
sys/ufs/ufs/inode.h                             patch
sys/ufs/ufs/ufs_extern.h                        patch
sys/ufs/ufs/ufs_lookup.c                        patch
sys/ufs/ufs/ufs_vnops.c                         patch
sys/ufs/ufs/ufs_wapbl.c                         patch

        Port dholland's ufs_rename locking changes to netbsd-5.
        [buhrow, ticket #1759]

        Hello.  More testing has revealed a minor misunderstanding between the
vnode API in -current and 5.x.  The below patch, against NetBSD-5.1
sources, rolls all the accumulated patches into one patch set.  With this
patch, I believe you can now run with WAPBL, softdep or traditional ufs
semantics with heavy file loads and avoid panics due to resource exhaustion
and/or tstile deadlocks.  Testing has been done on I386, both uniprocessor
and multiprocessor, and on Sparc  machines in uniprocessor mode, though I
think multiprocessor Sparc would be fine as well.  Since these changes are
machine independent, I don't anticipate any issues on any platform.  It is
my hope that modulo any final issues that come up in the final round of
testing I'm currently performing, these patches will be ready to be pulled
up into the NetBSD-5 branch.
        Finally, I'd like to thank mouse@ and hannken@ for their help and
patience in helping me track down and test the final versions of these
patches.  With their assistance, I'm confident these patches make NetBSD-5
a much more stable and robust operating environment in a variety of
setings.


To generate a diff of this commit:
cvs rdiff -u -r1.218 -r1.218.6.1 src/sys/ufs/lfs/lfs_vnops.c
cvs rdiff -u -r1.54.4.1 -r1.54.4.2 src/sys/ufs/ufs/inode.h
cvs rdiff -u -r1.60 -r1.60.8.1 src/sys/ufs/ufs/ufs_extern.h
cvs rdiff -u -r1.99.4.1 -r1.99.4.2 src/sys/ufs/ufs/ufs_lookup.c
cvs rdiff -u -r1.169.4.1 -r1.169.4.2 src/sys/ufs/ufs/ufs_vnops.c
cvs rdiff -u -r1.2.8.1 -r1.2.8.2 src/sys/ufs/ufs/ufs_wapbl.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.