From: Laurent Dufour <ldufour@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>, Ming Lei <ming.lei@canonical.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Mark Salter <msalter@redhat.com>,
"James E. J. Bottomley" <JBottomley@odin.com>,
brking <brking@us.ibm.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-block@vger.kernel.org
Subject: Re: kernel BUG at drivers/scsi/scsi_lib.c:1096!
Date: Sat, 21 Nov 2015 12:30:14 +0100 [thread overview]
Message-ID: <565055C6.5040801@linux.vnet.ibm.com> (raw)
In-Reply-To: <1448021448.14769.7.camel@ellerman.id.au>
On 20/11/2015 13:10, Michael Ellerman wrote:
> On Thu, 2015-11-19 at 00:23 -0800, Christoph Hellwig wrote:
>
>> It's pretty much guaranteed a block layer bug, most likely in the
>> merge bios to request infrastucture where we don't obey the merging
>> limits properly.
>>
>> Does either of you have a known good and first known bad kernel?
>
> Not me, I've only hit it one or two times. All I can say is I have hit it in
> 4.4-rc1.
>
> Laurent, can you narrow it down at all?
It seems that the panic is triggered by the commit bdced438acd8 ("block:
setup bi_phys_segments after splitting") which has been pulled by the
merge d9734e0d1ccf ("Merge branch 'for-4.4/core' of
git://git.kernel.dk/linux-block").
My system is panicing promptly when running a kernel built at
d9734e0d1ccf, while reverting the commit bdced438acd8, it can run hours
without panicing.
This being said, I can't explain what's going wrong.
May Ming shed some light here ?
Cheers
next prev parent reply other threads:[~2015-11-21 11:30 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-18 9:18 kernel BUG at drivers/scsi/scsi_lib.c:1096! Michael Ellerman
2015-11-18 11:06 ` Laurent Dufour
2015-11-18 11:10 ` Michael Ellerman
2015-11-18 11:17 ` Laurent Dufour
2015-11-18 14:03 ` Mark Salter
2015-11-19 1:02 ` Michael Ellerman
2015-11-19 8:23 ` Christoph Hellwig
2015-11-19 15:35 ` Hannes Reinecke
2015-11-20 14:38 ` Ewan Milne
2015-11-20 14:55 ` Hannes Reinecke
2015-11-20 15:28 ` Ewan Milne
2015-11-23 6:55 ` Hannes Reinecke
2015-11-25 9:04 ` Hannes Reinecke
2015-11-25 17:56 ` Jens Axboe
2015-11-25 19:10 ` Hannes Reinecke
2015-11-25 19:24 ` Jens Axboe
2015-11-25 20:23 ` Mike Snitzer
2015-11-25 21:20 ` Mike Snitzer
2015-11-25 18:01 ` Mike Snitzer
2015-11-25 19:01 ` Hannes Reinecke
2015-12-04 16:59 ` Takashi Iwai
2015-12-04 17:02 ` Jens Axboe
2015-12-04 17:09 ` Takashi Iwai
2015-11-20 12:10 ` Michael Ellerman
2015-11-20 12:56 ` Laurent Dufour
2015-11-20 13:37 ` Mark Salter
2015-11-21 11:30 ` Laurent Dufour [this message]
2015-11-21 16:56 ` Ming Lei
2015-11-22 23:20 ` Mark Salter
2015-11-23 0:36 ` Ming Lei
2015-11-23 1:50 ` Mark Salter
2015-11-23 2:46 ` Ming Lei
2015-11-23 15:21 ` Ming Lei
2015-11-24 18:59 ` Alan Ott
2015-11-23 13:57 ` Laurent Dufour
2015-11-23 15:13 ` Pratyush Anand
2015-11-23 15:20 ` Laurent Dufour
2015-11-23 15:27 ` Ming Lei
2015-11-23 16:24 ` Laurent Dufour
2015-11-24 1:30 ` Mark Salter
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