linux-kernel - Re: [BUG] scsi: hpsa: how to destroy your files

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Message-ID: <20110901115826.287538bd@jbarnes-desktop>
Date:	Thu, 1 Sep 2011 11:58:26 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
Cc:	Roland Dreier <roland@...estorage.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	scameron@...rdog.cce.hp.com, Jon Mason <mason@...i.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	stephenmcameron@...il.com, thenzl@...hat.com,
	akpm@...ux-foundation.org, mikem@...rdog.cce.hp.com
Subject: Re: [BUG] scsi: hpsa: how to destroy your files

On Thu, 01 Sep 2011 11:50:38 -0700
James Bottomley <James.Bottomley@...senPartnership.com> wrote:

> On Thu, 2011-09-01 at 10:58 -0700, Roland Dreier wrote:
> > > OK I found the bad commit,I got lucky... I lost some files but my
> > > machine was able to complete the bisection. CC involved people
> > 
> > > # bad: [b03e7495a862b028294f59fc87286d6d78ee7fa1] PCI: Set PCI-E Max Payload Size on fabric
> > 
> > Hi Eric,
> > 
> > I guess it would be useful to see "lspci -vv" output with a "good" kernel
> > and with that bad patch applied.  Most likely we should see some difference
> > somewhere in the MaxPayload fields in the PCI Express capability of
> > some device.
> > 
> > Either the RAID controller or something else lies, and puts a value
> > in the DevCap that it can't actually support, or else the patch is
> > buggy and puts something out of range in a DevCtl somewhere.
> 
> 
> While we investigate, I think the problems produced by the patch (data
> corruption) are serious enough to warrant reverting it, please Jesse.

Yep, I just got another report about it today too, I'll queue the
revert.

-- 
Jesse Barnes, Intel Open Source Technology Center
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