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

Pavel Machek
2005-06-27T18:05:08Z

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.