linux-kernel - Re: Possibly SATA related freeze killed networking and RAID

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Date:	Fri, 30 Nov 2007 21:25:41 +0100
From:	Pavel Machek <pavel@....cz>
To:	Mark Lord <lkml@....ca>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Phillip Susi <psusi@....rr.com>, Tejun Heo <htejun@...il.com>,
	noah <noah123@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org
Subject: Re: Possibly SATA related freeze killed networking and RAID

On Fri 2007-11-30 10:00:55, Mark Lord wrote:
> Pavel Machek wrote:
>> On Fri 2007-11-30 13:13:44, Alan Cox wrote:
>>>> Why does a single spurious interrupt cause it to be shut down?  I can 
>>> It doesn't.
>>>
>>>> see if the interrupt is stuck on and keeps interrupting constantly, but 
>>>> if it's just the occasional spurious interrupt, why not just ignore it 
>>>> and move on?
>>> The interrupt is usually level triggered so it continues to create
>>> interrupts until you silence it. The thresholds are about 10,000
>>> interrupt events and on newer kernels we also reset the count if we don't
>>> see any for a while. That works for most stuff except the thinkpad
>>> bluetooth problem.
>> Which is confirmed hw problem now, btw.
> ...
>
> What problem is that, exactly?

Spurious interrupt, interrupt link is disabled after ~15 minutes. It
seems pretty unique to t61.

> My Dell has an internal USB BT adapter that briefly appears
> and then disappears again on resume (or stays if I have "enabled" it
> via the BIOS key).
>
> I wonder if that has anything to do with the (new in) 2.6.23 pauses
> that machine has on resume (about every 10th time).

No idea, but t61 problem seems different.
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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