Re: [PATCH] x86: Add clflush before monitor for Intel 7400 series -v2

[Alan Cox]

On Fri, 6 Feb 2009 16:47:29 -0800
"Pallipadi, Venkatesh" <venkatesh.pallipadi@xxxxxxxxx> wrote:

> 
> 
> For Intel 7400 series CPUs, the recommendation is to use a clflush on the
> monitored address just before monitor and mwait pair [1]. This clflush makes
> sure that there are no false wakeups from mwait when the monitored address
> was recently written to.

Given our mwait usages will very quickly go back to sleep in such a case
and it would almost certainly be one sleep only is this really worth the
effort ?
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