Re: Software suspend testing in 2.6.0-test1

Andrew Morton
2003-07-18T19:30:06Z

Pavel Machek <pavel@ucw.cz> wrote:
>
> > It would be much better to freeze kernel threads _after_ doing the big
> > memory shrink.
>
> I wanted to avoid that: we do want user threads refrigerated at that
> point so that we know noone is allocating memory as we are trying to
> do memory shrink.

freeze(threads which have task->mm)
shrink_memory();
freeze(threads which have !task->mm)

That's pretty simple.

> I'd like to avoid having refrigerator run in two phases....

The whole thing can deadlock without kernel thread services.