linux-kernel - Re: SATA exceptions with 2.6.20-rc5

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Date:	Mon, 22 Jan 2007 18:53:22 +0100
From:	Björn Steinbrink <B.Steinbrink@....de>
To:	Robert Hancock <hancockr@...w.ca>, Jeff Garzik <jeff@...zik.org>,
	Chr <chunkeey@....de>,
	Alistair John Strachan <s0348365@....ed.ac.uk>,
	linux-kernel@...r.kernel.org, htejun@...il.com,
	jens.axboe@...cle.com, lwalton@...l.com, pomac@...or.com
Subject: Re: SATA exceptions with 2.6.20-rc5

On 2007.01.22 17:57:08 +0100, Björn Steinbrink wrote:
> On 2007.01.22 17:12:40 +0100, Björn Steinbrink wrote:
> > On 2007.01.21 18:17:01 -0600, Robert Hancock wrote:
> > > Hmm, another miss, apparently.. Has anyone tried removing these lines
> > > >from nv_host_intr in 2.6.20-rc5 sata_nv.c and see what that does?
> > > 
> > >     /* bail out if not our interrupt */
> > >     if (!(irq_stat & NV_INT_DEV))
> > >         return 0;
> > 
> > Running a kernel with the return statement replace by a line that prints
> > the irq_stat instead.
> > 
> > Currently I'm seeing lots of 0x10 on ata1 and 0x0 on ata2.
> 
> 40 minutes stress test now and no exception yet. What's interesting is
> that ata1 saw exactly one interrupt with irq_stat 0x0, all others that
> might have get dropped are as above.
> I'll keep it running for some time and will then re-enable the return
> statement to see if there's a relation between the irq_stat 0x0 and the
> exception.

No, doesn't seem to be related, did get 2 exceptions, but no irq_stat
0x0 for ata1. Syslog/dmesg has nothing new either, still the same
pattern of dismissed irq_stats.

Björn
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