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SubjectRe: [rfc patch] Re: sched: incorrect argument used in task_hot()
On Fri, 2006-11-17 at 20:20 +0100, Ingo Molnar wrote:
> * Mike Galbraith <> wrote:
> > One way to improve granularity, and eliminate the possibility of
> > p->last_run being > rq->timestamp_tast_tick, and thereby short
> > circuiting the evaluation of cache_hot_time, is to cache the last
> > return of sched_clock() at both tick and sched times, and use that
> > value as our reference instead of the absolute time of the tick. It
> > won't totally eliminate skew, but it moves the reference point closer
> > to the current time on the remote cpu.
> >
> > Looking for a good place to do this, I chose update_cpu_clock().
> looks good to me - thus we will update the timestamp not only in the
> timer tick, but also upon every context-switch (when we acquire
> sched_clock() value anyway). Lets try this in -mm?
> Acked-by: Ingo Molnar <>

Then it needs a blame line.

Signed-off-by: Mike Galbraith <>


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