* Re: [Bugme-new] [Bug 14214] New: BUG at drivers/scsi/scsi_lib.c:1108!
[not found] ` <20090930125607.752808d6.akpm@linux-foundation.org>
@ 2009-09-30 21:19 ` James Bottomley
0 siblings, 0 replies; only message in thread
From: James Bottomley @ 2009-09-30 21:19 UTC (permalink / raw)
To: Andrew Morton; +Cc: Rafael J. Wysocki, Jens Axboe, bugzilla-daemon, linux-raid
On Wed, 2009-09-30 at 12:56 -0700, Andrew Morton wrote:
> On Wed, 23 Sep 2009 11:13:26 GMT
> bugzilla-daemon@bugzilla.kernel.org wrote:
>
> > http://bugzilla.kernel.org/show_bug.cgi?id=14214
>
> Post-2.6.31 regression. This, in scsi_setup_fs_cmnd():
>
> /*
> * Filesystem requests must transfer data.
> */
> BUG_ON(!req->nr_phys_segments);
Well, the BUG_ON is correct: there can't be a FS type command with no
data.
This can't be a SCSI issue because the problem was caused before SCSI
was entered. Looking at the backtrace (all functions listed as
unreliable, sigh) this is either a deadline scheduler problem (less
likely) or an md_raid one (more likely).
Let's start with what was the mdraid configuration and condition of the
filesystem being mounted? I've added linux-raid to the cc list so they
can chime in for more details.
James
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