Re: [RFC] Fix SMP brokenness for PF_FREEZE and make freezing usable for other purposes

[Pavel Machek]

Hi!

> >Should be very easy to solve with one semaphore. Simply make swsusp
> >wait until all migrations are done.  
> 
> This may not be needed.  If I understand things correctly, the system
> won't suspsend until all tasks have returned from system calls and end
> up in the refrigerator.  So if a memory migration is  running when
> someone tries to suspend the system, the suspend won't
> occur until the memory migration system call returns.
> 
> Is that correct?

No, because now migration tries to using same freezer
mechanism. Oops. Semaphore solves it nicely....

								Pavel
-- 
Boycott Kodak -- for their patent abuse against Java.
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