Re: [PATCH] x86: limit mwait_idle to Intel CPUs

From: Andi Kleen
Date: Thu Apr 05 2007 - 10:25:22 EST


On Thursday 05 April 2007 16:00:45 Andreas Herrmann wrote:
>
> Commit 991528d7348667924176f3e29addea0675298944
> introduced mwait_idle which is supposed to work
> for Intel CPUs starting with Core Duo.
>
> AMD Fam10 processors won't enter C1 on mwait.

Unfortunate. Will this be fixed?

> This patch will enable default_idle for non-Intel
> CPUs even if mwait is supported.

It would be better to clear MONITOR/MWAIT in the AMD specific
CPU initialize code than add workarounds everywhere else.

-Andi
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