Re: [patch] voluntary-preempt-2.6.8.1-P1

Ingo Molnar
2004-08-17T07:37:59Z

* Lee Revell <rlrevell@joe-job.com> wrote:

> > i don't know if this was mentioned before, but i sometimes see traces
> > like this where half the entries are "preempt_schedule
> > (copy_page_range)". I just wanted to ask if this is normal and expected
> > behaviour.
>
> Yes, Ingo identified an issue with copy_page_range, I don't think it's
> fixed yet. See the voluntary-preempt-2.6.8.1-P0 thread.

right, it's not fixed yet. It's not a trivial critical section - we are
holding two locks and are mapping two atomic kmaps.

Ingo