On Thu, 23 Aug 2007 16:54:23 +0530
Gautham R Shenoy <[email protected]> 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 <[email protected]>
>
> Cc: Thomas Gleixner <[email protected]>
> Cc: Ingo Molnar <[email protected]>
> Cc: john stultz <[email protected]>
> Signed-off-by: Andrew Morton <[email protected]>
> ---
>
> 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.
-
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