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To: Pavel Machek <pavel@ucw.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Fw: 2.6.9-rc1-mm4: swsusp + AMD64 = LOCKUP on CPU0
References: <20040908021637.57525d43.akpm@osdl.org.suse.lists.linux.kernel>
	<20040908102652.GA2921@atrey.karlin.mff.cuni.cz.suse.lists.linux.kernel>
From: Andi Kleen <ak@suse.de>
Date: 08 Sep 2004 14:01:08 +0200
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Pavel Machek <pavel@ucw.cz> writes:

> Hi!
> 
> > One for you guys on lkml ;)
> 
> It simply takes long to count pages (O(n^2) algorithm), so watchdog
> triggers. I have better algorithm locally, but would like merge to
> linus first. (I posted it to lkml some days ago, I can attach the
> bigdiff).
> 
> Just disable the watchdog. Suspend *is* going to take time with
> disabled interrupts.


As a short term workaround you could also add touch_nmi_watchdog()s
in that loop.

-Andi