Re: Software suspend testing in 2.6.0-test1

Nigel Cunningham
2003-07-18T21:07:02Z

Hi.

In 2.4, I ended up fusing the freezer and shrinking memory together. The
essence is:

freeze all other processes
while need to free memory
unfreeze processes
shrink memory until think we have enough
freeze processes

Regards,

Nigel

On Sat, 2003-07-19 at 06:04, Pavel Machek wrote:
> Hi!
>
> > > 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. I'd like to avoid having refrigerator run in two
> > > phases....
> >
> > But we should be the only process running, and we can guarantee that by
> > not sleeping and doing preempt_disable() when we begin. Especially
> > if we start the refrigeration sequence after we shrink
> > memory. Right?
>
> If we refrigerate after we shrink, userspace can allocate everything
> just after shrink.
> Pavel
--
Nigel Cunningham
495 St Georges Road South, Hastings 4201, New Zealand

You see, at just the right time, when we were still powerless,
Christ died for the ungodly.
-- Romans 5:6, NIV.