Re: [PATCH] perf_events: fix bug in AMD per-cpu initialization

From: Stephane Eranian
Date: Tue Mar 23 2010 - 11:12:48 EST


On Tue, Mar 23, 2010 at 4:07 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Tue, 2010-03-23 at 15:55 +0100, Stephane Eranian wrote:
>> What's the point of CPU_ONLINE vs. CPU_STARTING if you're saying the
>> former is never right? Why not move CPU_ONLINE to the right place and
>> drop CPU_STARTING?
>
> Its right for a lot of things, just not for perf, we need to be ready
> and done by the time the cpu starts scheduling.
>
You mean they need to wait until after the cpu starts scheduling?
As opposed to being called just before it starts scheduling.
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