* Andrew Morton <[email protected]> wrote:
> These patches make my Vaio run really really slowly. Maybe a quarter
> of the normal speed or lower. Bisection shows that the bug is
> introduced by
> clockevents-drivers-for-i386.patch+clockevents-drivers-for-i386-fix.patch
>
> With all patches applied, the slowdown happens with
> CONFIG_HIGH_RES_TIMERS=n and also with CONFIG_HIGH_RES_TIMERS=y &&
> CONFIG_NO_HZ=y. So something got collaterally damaged.
yeah, i suspect it works again if you disable:
CONFIG_X86_UP_APIC=y
CONFIG_X86_UP_IOAPIC=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
as the slowdown has the feeling of a runaway lapic timer irq.
from code review so far we can only see an udelay(10) difference in the
initialization sequence of the PIT - we'll send a fix for that but i
dont think that's the cause of the bug.
investigating it.
Ingo
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