From: Louis-David Mitterrand <vindex+lists-linux-scsi@apartia.org>
Subject: Re: MPT2SAS deadlocking on failed disk
Date: Sun, 24 Oct 2010 22:28:56 +0200
Message-ID: <20101024202856.GA15596@apartia.fr>
References: <0AF91KJ@briare1.fullpliant.org>
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To: linux-scsi@vger.kernel.org

On Sun, Oct 24, 2010 at 11:36:18AM +0000, Hubert Tonneau wrote:
> Hi,
> 
> In stock Linux 2.6.35.7 kernel,
> with mpt2sas driver connected to two disks (no raid at controler level),
> and Linux MD software RAID1,
> 
> if I hot unplug one of the disks,
> instead of the failed disk beeing removed from the MD raid set,
> I get locked disk subsystem with all applications trying to write to
> the disks beeing locked. No kernel message related to disks, only
> to applications beeing locked.
> 
> This bug is probably not related specificaly to kernel 2.6.35.7
> because I had not used LSI controlers for years.

FWIW I had horrible problems on 2.6.35.x (grml) with the mpt2sas driver
(like running lilo would eject most disks in a running raid6).

All these problems went away with 2.6.36.