Re: [PATCH] x86, acpi, idle: Restructure the mwait idle routines

[Arjan van de Ven]

On 11/20/2013 8:33 AM, Peter Zijlstra wrote:
> On Wed, Nov 20, 2013 at 08:24:47AM -0800, Arjan van de Ven wrote:
> > On 11/20/2013 2:58 AM, Peter Zijlstra wrote:
> > > So pretty silly actually; you cannot do a store (any store) in between
> > > monitor and mwait.
> >
> > you can
> > just not to the cacheline you are watching (or things that alias with that)
>
> Ah indeed, the thread_info::status is in the same cacheline.

you told it to wake on any write to that cacheline
and then you write to it ;-)

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