Re: [tip:x86/idle] x86, idle: Use static_cpu_has() for CLFLUSHworkaround, add barriers

[Linus Torvalds]

On Fri, Dec 20, 2013 at 6:14 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
>
>
> So, my thinking was that maybe it's the other way around: the problem
> is with the write not being drained to cache yet.

That is possible. I haven't seen the exact details of the monitor
errata . If it's just about the write buffer and cache interaction,
then I agree that the barrier after the write in
current_set_polling_and_test() is sufficient.  But in the absense of
knowledge, I think we should have it after the read too.

              Linus
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