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DateFri, 6 Apr 2007 16:22:33 -0700
FromAndrew Morton <>
SubjectRe: [patch 18/20] clean up tsc-based sched_clock
On Wed, 04 Apr 2007 12:12:09 -0700 Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Three cleanups:
> - change "instable" -> "unstable"
> - its better to use get_cpu_var for getting this cpu's variables
> - change cycles_2_ns to do the full computation rather than just the
> tsc->ns scaling. Its a simpler interface, and it makes the function
> more generally useful.
>
> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
>
> ---
> arch/i386/kernel/sched-clock.c | 35 +++++++++++++++++++++--------------

I'm dropping the relevant patch from Andi's tree due to it causing
mysterious hangs when initscripts start ondemand. So I'll need to drop
this patch and "[patch 19/20] Add a sched_clock paravirt_op".


I still need to work out why that hang is happening - it is very
mysterious. I got as far as working out that it was hanging on
write_seqlock_irqsave(xtime_lock), then remembered that it's with
CONFIG_SMP=n so I stomped off to bed in disgust. Later.
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