Date: Wed, 14 Feb 2007 06:47:17 -0800 From: Wes Peters <wes@opensail.org> To: Kevin Oberman <oberman@es.net> Cc: Craig Rodrigues <rodrigc@FreeBSD.org>, cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/fs/unionfs union.h union_subr.c union_vfsops.c union_vnops.c src/sbin/mount_unionfs Makefile mount_unionfs.8 mount_unionfs.c Message-ID: <9BB94061-D398-48C3-9510-8053BFF1726A@opensail.org> In-Reply-To: <20070213152252.0E7CB4507B@ptavv.es.net> References: <20070213152252.0E7CB4507B@ptavv.es.net>
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On Feb 13, 2007, at 7:22 AM, Kevin Oberman wrote:
>> From: Craig Rodrigues <rodrigc@FreeBSD.org>
>> Date: Tue, 13 Feb 2007 05:56:43 +0000 (UTC)
>> Sender: owner-cvs-all@freebsd.org
>>
>> rodrigc 2007-02-13 05:56:43 UTC
>>
>> FreeBSD src repository
>>
>> Modified files: (Branch: RELENG_6)
>> sys/fs/unionfs union.h union_subr.c union_vfsops.c
>> union_vnops.c
>> sbin/mount_unionfs Makefile mount_unionfs.8 mount_unionfs.c
>> Log:
>> MFC: New unionfs implementation from Daichi GOTO and Masanori
>> OZAWA,
>> which fixes many locking and crashing problems in the previous
>> implementation. kib@ helped a lot by eliminating a source
>> of deadlocks encountered with unionfs with these commits:
>> rev. 1.50 of src/sys/fs/deadfs/dead_vnops.c
>> rev. 1.97 of src/sys/kern/vfs_lookup.c
>> Submitted by: daichi, Masanori OZAWA <ozawa ongs co jp>
> Thanks for MFCing this work and to the authors who put all the work
> into
> actually making unionfs work as it should. As a regular user of
> unionfs
> (at this moment /etc is a unionfs on the system from which I am
> sending
> this), it's great that I can worry less about blowing off my foot if I
> am not VERY careful what operations I do with the unionfs filesystem.
Ditto. We use unionfs extensively in our build system, and take down
the unions and chroot's once a build is finished running (~2 hrs) and
therefore crash the build box about every 5th build. You can't
imagine how much this is going to help... ;^)
--
Where am I, and what am I doing in this handbasket?
Wes Peters
wes@softweyr.com
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