Re: [PATCH] SN2 user-MMIO CPU migration

[Brent Casavant]

On Fri, 20 Jan 2006, Ingo Molnar wrote:

> hm, why isnt the synchronization done in switch_to()? Your arch-level 
> switch_to() could have something like thread->last_cpu_sync, and if 
> thread->last_cpu_sync != this_cpu, do the flush. This would not only 
> keep this stuff out of the generic scheduler, but it would also optimize 
> things a bit more: the moment we do a set_task_cpu() it does not mean 
> that CPU _will_ run the task. Another CPU could grab that task later on.  

Very good points all around.  I'll rework the changes in just the
manner you mentioned.

Brent

-- 
Brent Casavant                          All music is folk music.  I ain't
bcasavan@xxxxxxx                        never heard a horse sing a song.
Silicon Graphics, Inc.                    -- Louis Armstrong
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