Re: [PATCH] cpuacct: add a branch prediction

[KAMEZAWA Hiroyuki]

Peter Zijlstra さんは書きました：
> On Thu, 2009-02-26 at 19:28 +0900, KAMEZAWA Hiroyuki wrote:
>
>> Taking hierarchy mutex while reading will make read-side stable.
>
> We're talking about scheduling here, taking a mutex to stop scheduling
> won't work, nor will it be acceptible to use anything that will.
>
No mutex is necessary, anyway.
hierarchy-walker function completely works well under rcu read lock,
if small jitter is allowed.

Thanks,
-Kame

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