Date: Mon, 9 Jan 2012 18:30:51 +0100 From: Yamagi Burmeister <lists@yamagi.org> To: jeff@freebsd.org, mckusick@freebsd.org Cc: freebsd-current@freebsd.org, bryce@bryce.net Subject: Re: FS hang when creating snapshots on a UFS SU+J setup Message-ID: <20120109183051.1e4de3ca.lists@yamagi.org> In-Reply-To: <CAO_ZHU9%2Bj2V77zGyTUhSGYfzcde1ZjYB9uLpg-UHJkw0F_PTXg@mail.gmail.com> References: <CAO_ZHU8Au50SRkf3MgieAhh%2BQFBPiVaZsgHWiwfKjUVEpNuX3Q@mail.gmail.com> <CAO_ZHU9%2Bj2V77zGyTUhSGYfzcde1ZjYB9uLpg-UHJkw0F_PTXg@mail.gmail.com>
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Hello,
I'm sorry to bother you, but you may not be aware of this thread and
this problem. We are several people experiencing deadlocks, kernel=20
panics and other problems when creating sanpshots on file systems
with SU+J. It would be nice to get some feedback, e.g. how can we
help debugging and / or fixing this problem.
Thank you,
Yamagi
On Mon, 2 Jan 2012 23:27:57 -0600
Bryce Edwards <bryce@bryce.net> wrote:
> I have a RELENG_9 machine that hangs when a snapshot is created on the
> root fs (UFS, with SU+J). =A0More accurately, all the processes show a
> state of "suspfs" (with ^T) and no fs activity is completed from then
> on. =A0A hard reboot (power cycle) was the only way to proceed.
>=20
> Here's some reference info - let me know what else I should provide.
>=20
> $uname -a
> FreeBSD xxx.xxx.net 9.0-PRERELEASE FreeBSD 9.0-PRERELEASE #0: Sun Dec
> 25 05:04:37 UTC 2011 =A0 =A0 root@xxx.xxx.net:/usr/obj/usr/src/sys/GENERIC
> amd64
>=20
> csup was run just before build[world|kernel] so you have reference on
> the version information.
>=20
> $mount
> /dev/gpt/root on / (ufs, local, journaled soft-updates)
> devfs on /dev (devfs, local, multilabel)
> linprocfs on /compat/linux/proc (linprocfs, local)
> { zfs info removed }
>=20
> $df -h
> Filesystem =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Size =A0 =A0Used =A0 Avail =
Capacity =A0Mounted on
> /dev/gpt/root =A0 =A0 =A0 =A0 =A0 =A0 =A0 454G =A0 =A09.1G =A0 =A0409G =
=A0 =A0 2% =A0 =A0/
> devfs =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 1.0k =A0 =A01.0k =A0 =
=A0 =A00B =A0 100% =A0 =A0/dev
> linprocfs =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 4.0k =A0 =A04.0k =A0 =A0 =
=A00B =A0 100% =A0 =A0/compat/linux/proc
> { zfs info removed }
>=20
> After the hard reset, there was a snapshot file listed in /.snap and
> it was ~465 GB, iirc. =A0Unfortunately, I needed to get things going
> again so I was not able to debug or diagnose further. =A0I may be able
> to schedule a time that I could recreate the issue and diagnose
> better, but I wanted to get your input on what data points and/or
> command you would be interested in.
>=20
> Thanks in advance,
>=20
> Bryce
> _______________________________________________
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> http://lists.freebsd.org/mailman/listinfo/freebsd-current
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>=20
--=20
Homepage: www.yamagi.org
XMPP: yamagi@yamagi.org
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