Date: Wed, 18 Apr 2007 00:02:06 +0900 From: "Hidetoshi Shimokawa" <simokawa@FreeBSD.ORG> To: "Pawel Jakub Dawidek" <pjd@freebsd.org> Cc: Johan Hendriks <Johan@double-l.nl>, "Andrey V. Elsukov" <bu7cher@yandex.ru>, freebsd-current@freebsd.org Subject: Re: ls -al .zfs/snapshots dir reboots machine Message-ID: <626eb4530704170802t7a797961q16aa039251af10ea@mail.gmail.com> In-Reply-To: <20070417095631.GB4875@garage.freebsd.pl> References: <57200BF94E69E54880C9BB1AF714BBCBB521@w2003s01.double-l.local> <20070416094918.GC1068@garage.freebsd.pl> <46234D8E.8020501@yandex.ru> <20070416102623.GF1068@garage.freebsd.pl> <626eb4530704161851u74ba452am73bd8891b7b59e7f@mail.gmail.com> <20070417095631.GB4875@garage.freebsd.pl>
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On 4/17/07, Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
> On Tue, Apr 17, 2007 at 10:51:37AM +0900, Hidetoshi Shimokawa wrote:
> > I can repoduce this hang.
> >
> > # cd /pool/test/.zfs/snapshot
> > # /bin/ls
> > snap
> > # /bin/ls -F
> > ls: snap: No such file or directory
> > # /bin/ls -F
> > (hangs)
>
> Are you able to break into debugger? I was able to reproduce it once
> (but with panic in crdup()), but I can no longer do it...
In my case, only 'ls' hangs and other part of the system is normal.
# ps alxg | grep ls
0 2129 2118 0 -4 0 6100 1512 zfs D+ p0 0:00.01 /bin/ls -F
Once, I got "panic: lockmgr: locking against myself" 10 or 20 min. later
of "ls -F".
> > It looks like another name cache problem for me.
> > I noticed 'cache_purge(vp)' is commented out in domount() in opensolaris_vfs.c.
> > Shouldn't we need 'dnlc_purge_vp(vp)' here?
>
> There is dnlc_purge_vfsp() at the begining of zfs_umount(), which should
> be sufficient.
domount() of opensolaris also has dnlc_purge_vp() to invalidate cached
entry for the mount point. Do you really think it's unnecessary?
http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/vfs.c#1383
--
/\ Hidetoshi Shimokawa
\/ simokawa@FreeBSD.ORG
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