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SubjectRe: [PATCH] cpuacct: add a branch prediction

* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> On Thu, 2009-02-26 at 21:06 +0900, KAMEZAWA Hiroyuki wrote:
> > Hmm.. some routine like
> > atomic64_read() can help this ? (But I don't want to use atomic_t here..)
>
> Yeah, atomic64_t has been proposed numerous times, and x86
> could actually implement that using cmpxchg8b, just not sure
> about all the other 32bit archs, and if we start using it in
> the scheduler, they'd better have it implemented.

I have written a working atomic64_t implementation for
tip:perfcounters/core, for 32-bit x86.

Ingo


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