Message-ID: <1336090207.18712.9.camel@pasglop>
Subject: Re: [PATCH] powerpc: use local var instead of
 local_paca->irq_happened directly in __check_irq_replay
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Wang Sheng-Hui <shhuiw@gmail.com>
Cc: Milton Miller <miltonm@bga.com>, Grant Likely <grant.likely@secretlab.ca>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Anton Blanchard <anton@samba.org>, linuxppc-dev@lists.ozlabs.org,
        linux-kernel@vger.kernel.org
Date: Fri, 04 May 2012 10:10:07 +1000
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	 <4FA22CC5.3010107@gmail.com> <1336032561.18712.1.camel@pasglop>
	 <4FA31653.5090103@gmail.com>
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On Fri, 2012-05-04 at 07:35 +0800, Wang Sheng-Hui wrote:
> > No, Only comment the test, you must absolutely leave the
> > __hard_irq_disable() call ! That's the whole point of the test, make
> > sure we unconditionally disable to see if that fixes the problem, in
> > which case that will tell us that we somewhere accidentally leave
> > irq_happened set to 0x01 while irqs are hard enabled.
> 
> It can work.
> My system has been running for about 15 hours without crash.

Ok, so now we need to understand under what circumstances we end up
in a situation where paca->irq_happened is 0x01 and IRQs are hard
enabled. I have a few ideas of things to look at but I'm also off
for the week-end.

I'll have a look next week.

Cheers,
Ben.


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