linux-kernel - Re: kernel BUG at drivers/scsi/scsi

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Message-ID: <1448021448.14769.7.camel@ellerman.id.au>
Date:	Fri, 20 Nov 2015 23:10:48 +1100
From:	Michael Ellerman <mpe@...erman.id.au>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Mark Salter <msalter@...hat.com>,
	"James E. J. Bottomley" <JBottomley@...n.com>,
	brking <brking@...ibm.com>, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-block@...r.kernel.org,
	Laurent Dufour <ldufour@...ux.vnet.ibm.com>
Subject: Re: kernel BUG at drivers/scsi/scsi_lib.c:1096!

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?

cheers

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