From owner-freebsd-fs@FreeBSD.ORG  Wed Mar 17 12:31:07 2010
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Date: Wed, 17 Mar 2010 13:30:59 +0100
From: Kai Gallasch <gallasch@free.de>
To: Alexander Motin <mav@FreeBSD.org>
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Cc: freebsd-fs@FreeBSD.org, freebsd-stable@FreeBSD.org,
	Pawel Jakub Dawidek <pjd@FreeBSD.org>
Subject: Re: proliant server lockups with freebsd-amd64-stable (2010-03-10)
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> Am Fri, 12 Mar 2010 20:38:31 +0200
> schrieb Alexander Motin <mav@FreeBSD.org>:
> 
> > Pawel Jakub Dawidek wrote:
> > > On Thu, Mar 11, 2010 at 01:39:16PM +0100, Kai Gallasch wrote:
> > >> I have some trouble with an opteron server locking up
> > >> spontaneously. It looses all networks connectivity and even
> > >> through console I can get no shell.
> > >>
> > >> Lockups occur mostly under disk load (periodic daily, bacula
> > >> backup running, make buildworld/buildkernel) and I can provoke
> > >> them easily.
> > > [...]
> > >>     4     0     0     0  LL     *cissmtx  0xffffff04ed820c00
> > >> [g_down]
> > > [...]
> > >> 100046                   L      *cissmtx  0xffffff04ed820c00
> > >> [irq257: ciss0]
> > > [...]
> > > 
> > > I was analizing similar problem as potential ZFS bug. It turned
> > > out to be bug in ciss(4) and I believe mav@ (CCed) has fix for
> > > that.
> > 
> > That my patch is already at 8-STABLE since r204873 of 2010-03-08.
> > Make sure you have it.

Rebuilding the kernel with your 8-STABLE commited ciss patch seems to
have resolved this issue. Server now has an uptime of 5 days and
survives under high filesystem load. 

Alexander, thanks for fixing ciss.

 Kai.

-- 

Da das Pferd pfluegt, lasst uns den Esel satteln.