linux-kernel - RE: panics with 16port Promise Supertrack EX Controller

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Message-ID: <B70A50D07063384EB9BCE3330D18414F038973BD@nonameb.ptu.promise.com>
Date:	Mon, 16 Jul 2007 18:26:39 -0700
From:	"Ed Lin" <ed.lin@...mise.com>
To:	"Jens Axboe" <jens.axboe@...cle.com>,
	"Flavio Curti" <fcu@...way.org>
Cc:	"Nick Piggin" <nickpiggin@...oo.com.au>,
	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>,
	"Flavio Curti" <lists.fcu@...way.org>,
	<linux-kernel@...r.kernel.org>,
	"Promise_Linux" <Promise_Linux@...mise.com>
Subject: RE: panics with 16port Promise Supertrack EX Controller



> -----Original Message-----
> From: Jens Axboe [mailto:jens.axboe@...cle.com] 
> Sent: Monday, July 16, 2007 4:18 AM
> To: Flavio Curti
> Cc: Nick Piggin; Michal Piotrowski; Flavio Curti; 
> linux-kernel@...r.kernel.org; Promise_Linux
> Subject: Re: panics with 16port Promise Supertrack EX Controller
> 
> 
> On Sun, Jul 15 2007, Flavio Curti wrote:
> > Hello
> > 
> > On Mon, Jul 09, 2007 at 11:59:36AM +1000, Nick Piggin wrote:
> > > >Jul  8 00:19:13 dorade.cyberlink.ch EFLAGS: 00210046   
> > > >(2.6.22-rc7-dorade #1)
> > > >>The machine panics
> > > >>after some days of running fine, the machine inst heavy loaded.
> > > >>The Controller detects as stex device:
> > > >kernel BUG at block/as-iosched.c:1084!
> > > >
> > > >BUG_ON(RB_EMPTY_ROOT(&ad->sort_list[REQ_ASYNC]));
> > > Could be a bug in the driver that just happens to be 
> caught by AS checks.
> > > If you could test another scheduler (boot with 
> elevator=deadline or 
> > > elevator=cfq),
> > > it might help give us an idea.
> > 
> > Ok, I now switched to cfg, and the machine panicd again. 
> Panic attached.
> > Any help is appreciated.
> 
> It really looks like a stex bug - perhaps it's doing double 
> completions
> of a request?
> 


I will come up with something related to tag lock, and see
what happens after that.

Ed Lin
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