Re: [RFC][PATCH] remove rq->lock from cpuacct cgroup (Was Re:[PATCH] cpuacct: add a branch prediction

[Peter Zijlstra]

On Tue, 2009-03-03 at 18:04 +0900, KAMEZAWA Hiroyuki wrote:
> Peter Zijlstra wrote:
> > On Tue, 2009-03-03 at 08:42 +0900, KAMEZAWA Hiroyuki wrote:
> >
> >> > Furthermore, if you want something like schedule_work_on() for each
> >> cpu,
> >> > there's schedule_on_each_cpu().
> >> >
> >> It can't pass arguments...Maybe I should use rq->lock here to reset
> >> other cpu's value.
> >
> > Why bother with serializing the reset code at all?
> >
>   I don't think reset v.s. read is problem but reset v.s. increment
>   (read-modify-write) can't be ?

Sure, can be, do we care?


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