linux-kernel - Re: Prevent softlockup triggering in nvidiafb

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Message-ID: <8245.10.250.10.1.1177369597.squirrel@www01.pol.sec1.webmd.com>
Date:	Tue, 24 Apr 2007 07:06:37 +0800 (PHT)
From:	"Antonino A. Daplas" <adaplas@....net>
To:	<davej@...hat.com>
Cc:	<alan@...rguk.ukuu.org.uk>, <linux-kernel@...r.kernel.org>,
	<adaplas@....net>
Subject: Re: Prevent softlockup triggering in nvidiafb

> On Mon, Apr 23, 2007 at 04:55:05PM +0100, Alan Cox wrote:
>  > On Mon, 23 Apr 2007 11:36:30 -0400
>  > Dave Jones <davej@...hat.com> wrote:
>  >
>  > > If the chip locks up, we get into a long polling loop,
>  > > where the softlockup detector kicks in.
>  > > See https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=151878
> for an example.
>  >
>  > Surely in this situation the softlockup report and trap out is
> precisely what should be occurring.
>
> We can't do anything useful with the trace.  It already prints out info
> that the hardware locked up.

And when nvidiafb detects a lockup, it will go to safe mode. Better than
rebooting, I think.

Tony



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