Re: [PATCH] SN2 user-MMIO CPU migration

From: Brent Casavant <>
Date: 2006-01-21 03:14:21
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 Casavant                          All music is folk music.  I ain't                        never heard a horse sing a song.
Silicon Graphics, Inc.                    -- Louis Armstrong
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Received on Sat Jan 21 03:15:08 2006

This archive was generated by hypermail 2.1.8 : 2006-01-21 03:15:15 EST