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

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Date:	Fri, 02 Sep 2011 07:32:58 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	scameron@...rdog.cce.hp.com
Cc:	Jon Mason <mason@...i.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	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,
	linux-pci@...r.kernel.org, Roland Dreier <roland@...estorage.com>,
	James Bottomley <James.Bottomley@...senpartnership.com>
Subject: Re: [BUG] scsi: hpsa: how to destroy your files

Le jeudi 01 septembre 2011 à 17:16 -0500, scameron@...rdog.cce.hp.com a
écrit :
> On Thu, Sep 01, 2011 at 04:50:45PM -0500, Jon Mason wrote:
> > On Thu, Sep 1, 2011 at 3:44 PM,  <scameron@...rdog.cce.hp.com> wrote:
> > > On Thu, Sep 01, 2011 at 01:09:30PM -0700, Jesse Barnes wrote:
> > >> On Thu, 1 Sep 2011 15:03:49 -0500
> > >> scameron@...rdog.cce.hp.com wrote:
> > >>
> > >> > On Thu, Sep 01, 2011 at 12:59:38PM -0700, Jesse Barnes wrote:
> > >> > > 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.
> > >> > >
> > >> > > Hm I haven't been paying attention to the compromise thread; how should
> > >> > > I share these changes?  Is master.kernel.org down indefinitely?  Is
> > >> > > there a new server at kernel.org I can use?
> > >> >
> > >> > I can't answer that question, but I would like a copy of your revert
> > >> > patch(es) to test (as a simple patch --reverse of the original commit on the 3.1-rc4
> > >> > tree didn't go in cleanly).
> > >>
> > >> Attached is the series.  Applies on top of my for-linus branch.
> > >
> > > Thanks.  I tried them out vs. 3.1-rc4, and they applied cleanly and
> > > make things work on my BL460g7.
> > 
> > I believe modifying the MRRS values is what is causing the issues.
> > Can you try the attached patch and verify that it also resolves the
> > issue?
> 
> Ok, just tried it.
> 
> The mrrs_removal patch does also appear to resolve the issue.
> 

I cannot say that right now, as it appears the last "bad" kernel
destroyed my distro enough that I cannot test this patch without a full
reinstall. (/root partition is busted, even after several fsck -f -y)

[   42.501569] EXT3-fs error (device cciss/c0d0p1): ext3_free_inode: bit already cleared for inode 424649
[   42.501721] Aborting journal on device cciss/c0d0p1.
[   42.516101] Remounting filesystem read-only
[   42.529563] EXT3-fs error (device cciss/c0d0p1) in ext3_delete_inode: IO failure


 I'll have to do this reinstall when I am at the office, in a couple of
hours.


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