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Message-ID: <40f323d00611101220t2b8067d5g4f6b302384e41524@mail.gmail.com>
Date: Fri, 10 Nov 2006 21:20:26 +0100
From: "Benoit Boissinot" <bboissin@gmail.com>
To: tglx@linutronix.de
Subject: Re: 2.6.19-rc5-mm1
Cc: "Andrew Morton" <akpm@osdl.org>, linux-kernel@vger.kernel.org
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On 11/10/06, Benoit Boissinot <bboissin@gmail.com> wrote:
> On 11/10/06, Thomas Gleixner <tglx@linutronix.de> wrote:
> > On Fri, 2006-11-10 at 17:29 +0100, Benoit Boissinot wrote:
> > > On 11/8/06, Andrew Morton <akpm@osdl.org> wrote:
> > > > [snip]
> > > > - The hrtimer+dynticks code still doesn't work right for machines which halt
> > > >   their TSC in low-power states.
> > > >
> > >
> > > With CONFIG_NO_HZ=y, xmoto (xmoto.sf.net, a 3d game) is sluggish, the
> > > movement is not fluid (it is "bursty").
> > >
> > > .config is at http://perso.ens-lyon.fr/benoit.boissinot/kernel/config-2.6.19-rc5-mm1
> > > lspci -vv: http://perso.ens-lyon.fr/benoit.boissinot/kernel/docked_lspci
> > > dmesg: http://perso.ens-lyon.fr/benoit.boissinot/kernel/dmesg-2.6.19-rc5-mm1
> >
> > I'm confused about that one:
> >
> > [    8.966364] Disabling NO_HZ and high resolution timers due to timer broadcasting (C3 stops local apic)
> >
> > This message is nowhere in rc5-mm1. It was in rc4-mmX, but got removed
> > in the updates.
> >
> I forget to mention I reverted the following patches from -mm:
> i386-apic-timer-use-clockevents-broadcast.patch
> acpi-verify-lapic-timer.patch
> acpi-verify-lapic-timer-exports.patch
> acpi-verify-lapic-timer-fix.patch
>
> since it did not boot with them.
>
> > > I can test any patch or provide any needed information.
> >
> > http://tglx.de/private/tglx/2.6.19-rc5-mm1-dyntick.diff
> >
> > That's the rework I did yesterday.
> >
>
> I'll undo the reverts I did and try it on top of -mm
>
It works fine with the following additional patch.

Thanks,

Benoit

Index: linux-mm/arch/i386/kernel/apic.c
===================================================================
--- a/arch/i386/kernel/apic.c	2006-11-10 20:42:30.000000000 +0100
+++ b/arch/i386/kernel/apic.c	2006-11-10 20:42:41.000000000 +0100
@@ -610,6 +610,7 @@
 	if (evt->event_handler)
 		clockevents_set_broadcast(evt, broadcast);
 }
+EXPORT_SYMBOL_GPL(lapic_timer_idle_broadcast);

 int setup_profiling_timer(unsigned int multiplier)
 {
-
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