Re: [PATCH 3/3] PM/Hibernate: Use memory allocations to free memory

Andrew Morton
2009-05-02T17:49:47Z

On Sat, 2 May 2009 13:46:34 +0200 "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org> wrote:

> > Do we need the bitmap? I expect we can just string all these pages
> > onto a local list via page.lru. Would need to check that - the
> > pageframe fields are quite overloaded.
>
> This is the reason why we use the bitmaps for hibernation. :-)

grep the tree for page->lru and you'll see that quite a few page
consumers are using it. So you'd be pretty safe doing it this way.

Whether it's _worth_ doing it this way is debatable, given that
hibernation uses bitmaps elsewhere. But it would shrink the patch a
bit I expect?