Re: [PATCH] cpu hotplug, sched:Introduce cpu_active_map and redoscheddomainmanagment (take 2)

From: Gregory Haskins
Date: Thu Jul 17 2008 - 15:42:55 EST

>>> On Thu, Jul 17, 2008 at 2:52 PM, in message <487F9509.9050802@xxxxxxxxxxxx>,
Max Krasnyansky <maxk@xxxxxxxxxxxx> wrote:
> Gregory Haskins wrote:
>> Hi Max,
>> Thanks for the pointers. I see that I did indeed misunderstand the intent
>> of the patch. It seems you already solved the rebuild problem, and were
>> just trying to solve the "migrate to a dead cpu" problem that Linus mentions
>> as a solution with cpu_active_map.
> Yes. btw they are definitely related, because the reason we were blowing
> away the domains is to avoid "migration to a dead cpu". ie We were relying
> on the fact that domain masks never contain cpus that are either dying or
> already dead.


>> Thoughts?
> None at this point :). I need to run right now and will try to look at this
> later today. My knowledge of the internal sched structs is definitely
> lacking so I need to look at the rq->rd thing to have and opinion.

Sounds good, Max. Thanks!


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