linux-kernel - Re: hpsa driver bug crack kernel down!

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Date:	Wed, 09 Apr 2014 16:10:44 -0700
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	Baoquan He <bhe@...hat.com>, linux-kernel@...r.kernel.org,
	scameron@...rdog.cce.hp.com,
	linux-scsi <linux-scsi@...r.kernel.org>
Subject: Re: hpsa driver bug crack kernel down!

On Wed, 2014-04-09 at 16:08 -0700, James Bottomley wrote:
> [+linux-scsi]
> On Wed, 2014-04-09 at 15:49 -0700, Davidlohr Bueso wrote:
> > On Wed, 2014-04-09 at 10:39 +0800, Baoquan He wrote:
> > > Hi,
> > > 
> > > The kernel is 3.14.0+ which is pulled just now. 
> > 
> > Cc'ing more people.
> > 
> > While the hpsa driver appears to be involved in some way, I'm sure if
> > this is a related issue, but as of today's pull I'm getting another
> > problem that causes my DL980 not to come up.
> > 
> > *Massive* amounts of:
> > 
> > DMAR:[fault reason 02] Present bit in context entry is clear
> > dmar: DRHD: handling fault status reg 602
> > dmar: DMAR:[DMA Read] Request device [02:00.0] fault addr 7f61e000
> > 
> > Then:
> > 
> > hpsa 0000:03:00.0: Controller lockup detected: 0xffff0000
> > ...
> > Workqueue: events hpsa_monitor_ctlr_worker [hpsa]
> > ...
> > 
> > Screenshot of the actual LOCKUP: 
> > http://stgolabs.net/hpsa-hard-lockup-3.14+.png
> > 
> > While I haven't bisected, things worked fine until at least until commit
> > 39de65aa2c3e (April 2nd).
> > 
> > Any ideas?
> 
> Well, it's either a DMA remapping issue or a hpsa one.  Your assertion
> that everything worked fine until 39de65aa2c3e would tend to vindicate
> hpsa, because all the hpsa changes went in before that under

Missing crucial info:

commit 1a0b6abaea78f73d9bc0a2f6df2d9e4c917cade1

> Merge: 3e75c6d b2bff6c
> Author: Linus Torvalds <torvalds@...ux-foundation.org>
> Date:   Tue Apr 1 18:49:04 2014 -0700
> 
>     Merge tag 'scsi-misc' of
> git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
> 
> can you revalidate that this commit works OK just to make sure?
> 
> James
> 
> 
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