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Message-Id: <200709171240.55260.jbarnes@virtuousgeek.org> Date: Mon, 17 Sep 2007 12:40:54 -0700 From: Jesse Barnes <jbarnes@...tuousgeek.org> To: Thomas Gleixner <tglx@...utronix.de> Cc: Randy Dunlap <randy.dunlap@...cle.com>, linux-kernel@...r.kernel.org Subject: Re: Lossy interrupts on x86_64 On Monday, September 17, 2007, Thomas Gleixner wrote: > 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 ? with nohz=off and highres=off I get a similar but not quite identical hang: the mouse pointer still moves around but my desktop is still hung and glxgears doesn't come up. Behavior is identical without boot options and with highres=off however (i.e. lossy interrupts in both cases). Jesse - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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