| Date | Wed, 11 Dec 2013 16:02:41 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: 50 Watt idle power regression bisected to Linux-3.10 |
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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.
Thanks,
tglx
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