Messages in this thread | | | Date | Wed, 11 Dec 2013 16:09:11 +0100 | From | Ingo Molnar <> | Subject | Re: 50 Watt idle power regression bisected to Linux-3.10 |
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* Thomas Gleixner <tglx@linutronix.de> wrote:
> On Wed, 11 Dec 2013, Ingo Molnar wrote: > > > > Another thing that is required I think is to issue a write barrier > > before CLFLUSH instruction. By my (possibly incorrect ...) reading of > > the documentation CLFLUSH does not appear to be ordered (at all), so > > it might execute before the modification to the affected memory? > > We already have a write barrier in the code which modifies > current_thread_info()->flags.
Which code is that, could you please cite it? (I tried finding it but my grep-fu failed me.)
Thanks,
Ingo
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