Re: [RFC][PATCH -mm 0/2] mm: shrink_all_memory improvements

[Pavel Machek <pavel@suse.cz>]

Hi!

> The following two patches are designed to improve the shrink_all_memory()
> function used by swsusp and other pm functions.
> 
> The first patch makes shrink_all_memory() overflow-resistant.  The problem is
> that, AFAICT, balance_pgdat(pgdat, nr_to_free, 0) may free more than nr_to_free
> pages, in which case nr_to_free, being unsigned, will overflow (and obviously
> it cannot be less than 0).  Also if the argument is too big, strange things may
> happen.
> 
> The first patch adds a workaround of the problem that shrink_all_memory() may
> return 0 even if there still are some pages to free.  WIth this patch applied
> it sometimes frees 2 times as many pages as without it on my box.
> 
> Please have a look and comment.

ACK on the first one, Andrew, please suggest how to do the second one
better.
								Pavel
-- 
Web maintainer for suspend.sf.net (www.sf.net/projects/suspend) wanted...
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