Re: [PATCH -mm 2/2]: PM: SMP-safe freezer

[Pavel Machek <pavel@ucw.cz>]

Hi!

> To solve first of these problems we need to stop using PF_FROZEN to tell
> tasks that they should go to the refrigerator.  Instead, we can introduce
> a special TIF_*** flag and use it for this purpose, since it is allowed to
> change the other tasks' TIF_*** flags and there are special calls for it.
> 
> To avoid the freeze_process()-refrigerator() race we can make freeze_process()
> to always check the task's PF_FROZEN flag after it's read its "freeze" flag.
> We should also make sure that refrigerator() will always reset the task's
> "freeze" flag after it's set PF_FROZEN for it.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

ACK.
								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
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