Messages in this thread | | | Date | Wed, 20 Nov 2013 08:38:52 -0800 | From | Arjan van de Ven <> | Subject | Re: [PATCH] x86, acpi, idle: Restructure the mwait idle routines |
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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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