| Date | Thu, 23 Aug 2007 13:47:26 -0700 | From | Andrew Morton <> | Subject | Re: x86_64-dynticks-disable-hpet_id_legsup-hpets.patch hangs the system |
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On Thu, 23 Aug 2007 16:54:23 +0530 Gautham R Shenoy <ego@in.ibm.com> wrote:
> 2.6.23-rc3-mm1 renders my machine unresponsive during bootup. > I've been observing this problem in 2.6.22-rc2-mm2 as well. > The boot log, the cpuinfo and .config have been appened at the > end > > After embedding a few debug printk's in start_kernel, I noticed that > the last function to be executed was calibrate_delay() > > Further, from the mm-bisect, the following patch turned out to be the > culprit: > > x86_64-dynticks-disable-hpet_id_legsup-hpets.patch > From: Andrew Morton <akpm@linux-foundation.org> > > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Ingo Molnar <mingo@elte.hu> > Cc: john stultz <johnstul@us.ibm.com> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > --- > > arch/i386/kernel/hpet.c | 2 +- > 1 files changed, 1 insertion(+), 1 deletion(-) > > diff -puN arch/i386/kernel/hpet.c~x86_64-dynticks-disable-hpet_id_legsup-hpets arch/i386/kernel/hpet.c > --- a/arch/i386/kernel/hpet.c~x86_64-dynticks-disable-hpet_id_legsup-hpets > +++ a/arch/i386/kernel/hpet.c > @@ -336,7 +336,7 @@ int __init hpet_enable(void) > > clocksource_register(&clocksource_hpet); > > - if (id & HPET_ID_LEGSUP) { > + if (0 && (id & HPET_ID_LEGSUP)) { > hpet_enable_int(); > hpet_reserve_platform_timers(id); > /* > > Any particular reason for this patch [There is no changelog :-)]? > Without this patch the mm-kernel seems to behave just fine for me.
Oh damn. That patch is required to prevent a boot-time div-by-zero on my old nocona machine.
I have a new set of x86_64-dynticks patches from Thomas to look at so I guess it's reset-and-start-again time on that front. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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