[patch 0/2] memcg: clean up limit checking

[Johannes Weiner]

On Mon, Jan 31, 2011 at 04:24:48PM -0800, Andrew Morton wrote:
> On Tue, 1 Feb 2011 01:04:55 +0100
> Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
> 
> > Maybe it would be better to use res_counter_margin(cnt) >= wanted
> > throughout the code.
> 
> yup.

Okay, I cleaned it all up a bit for .39.  While doing so, I also found
that we are reclaiming one page too much when pushing back on behalf
of soft limits.

So 1/2 fixes the soft limit reclaim off-by-one-page, and 2/2 reduces
all the limit checks to two functions.
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