Re: Fix SWSUSP & !SWAP

Nigel Cunningham
2003-04-23T23:55:06Z

I don't believer I've ever seen things get OOM killed. Instead, page
cache is discarded until things do fit.

Regards,

Nigel

On Thu, 2003-04-24 at 12:03, Pavel Machek wrote:
> Hi!
>
> > > From: Martin J. Bligh [mailto:mbligh@aracnet.com]
> > > Can't you just create a pre-reserved separate swsusp area on
> > > disk the size
> > > of RAM (maybe a partition rather than a file to make things
> > > easier), and
> > > then you know you're safe (basically what Marc was
> > > suggesting, except pre-allocated)? Or does that make me the
> > > prince of all evil? ;-)
> > >
> > > However much swap space you allocate, it can always all be
> > > used, so that seems futile ...
> >
> > This is what Other OSes do, and I believe this is the correct path.
> > Using swap for swsusp is a clever hack but not a 100% solution.
>
> Well, for normal use its clearly inferior -- suspend partition is unused
> when it could be used for speeding system up by swapping out unused
> stuff.
>
> OtherOS approach is better because it can guarantee suspend-to-disk
> for critical situations like overheat or battery-critical.
>
> But we can get best of both worlds if we OOM-kill during critical
> suspend. [If suspend partition was not used for swapping, machine
> would *already* OOM-killed someone, so we are only improving stuff].
>
> Pavel
--
Nigel Cunningham
495 St Georges Road South, Hastings 4201, New Zealand

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