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Message-Id: <1162414502.15900.261.camel@localhost.localdomain> Date: Wed, 01 Nov 2006 21:55:01 +0100 From: Thomas Gleixner <tglx@...utronix.de> To: Matthew Garrett <mjg59@...f.ucam.org> Cc: Arjan van de Ven <arjan@...radead.org>, Pavel Machek <pavel@....cz>, kernel list <linux-kernel@...r.kernel.org>, mingo@...hat.com, Andrew Morton <akpm@...l.org> Subject: Re: 2.6.19-rc4-mm1: noidlehz problems On Wed, 2006-11-01 at 15:22 +0000, Matthew Garrett wrote: > On Wed, Nov 01, 2006 at 02:02:57PM +0100, Arjan van de Ven wrote: > > > In some (hardware) C-states, the local apic timer stops (as does the > > TSC), while in others it keeps running. If you change from AC to > > battery, the bios can change the meaning of a software C-state from one > > where local apic timer keeps going to one where it stops. This obviously > > upsets the hrtimers/tickless code since that uses local apic timer for > > event generation.... > > Is there any hope of working around this? I'd have expected that the > most useful case for the tickless code was also the case where we want > to be using C3/C4... Can you try the following patches please ? http://tglx.de/projects/hrtimers/2.6.19-rc4-mm1/patch-2.6.19-rc4-mm1-hrt-dyntick1.patch This addresses the C34/C4 issue tglx - 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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