linux-kernel - Re: need help on a DEADLOCK problem related to function try_one

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Date:	Thu, 6 Dec 2012 13:23:40 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Edward Donovan <edward.donovan@...ble.net>
cc:	"Wang, Warner" <warner.wang@...com>,
	"Wang, Song-Bo (Stoney)" <song-bo.wang@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: need help on a DEADLOCK problem related to function
 try_one_irq()

Ed,

On Thu, 6 Dec 2012, Edward Donovan wrote:
> So, let me try to confirm some things now, so I can learn as I go.  To
> spell out what's in the new patch:
> 
> The later line,
> 
>   action = desc->action;
> 
> should have been this all along?
> 
>   action = action->next;

Yes. My bad :(
 
> And with that fixed, the other test can go.  Which is good, now,
> because it was creating locking problems for you.
> 
> Ok, thanks for bearing with me.   I'll repeat the test here, some
> more, but they've generally behaved consistently and probably will
> keep showing the same.
> 
> I might as well add that I would happily ship one of these computers,
> with a reliably spurious interrupt, to Thomas in Germany. if that
> would help for testing.

I'm always happy to have machines which expose strange symptoms.

Thanks,

	tglx
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