linux-kernel - Re: Lossy interrupts on x86

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Date:	Mon, 17 Sep 2007 21:18:23 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Lossy interrupts on x86_64


On Mon, 2007-09-17 at 12:13 -0700, Jesse Barnes wrote:
> On Wednesday, September 12, 2007, Thomas Gleixner wrote:
> > does it make any difference when you boot the box with:
> >
> > nohz=off
> >
> > on the kernel command line ?
> 
> Yeah, that makes a difference:  the box hangs when I start receiving 
> vblank interrupts instead.  However it's not a hard hang, I think X 
> just becomes unresponsive.  I can still hit the power button on the 
> laptop and the machine shuts down gracefully, but ctl-alt-delete and 
> ctl-alt-backspace don't work.  So X is probably still up and in charge 
> of input but may not be getting any more timeslices or something.

Eeek, that sounds scary. Can you add "highres=off" as well ?

	tglx


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