Re: [patch 4/4] memcg: use native word page statistics counters

From: Johannes Weiner
Date: Mon Nov 08 2010 - 04:09:04 EST


On Mon, Nov 08, 2010 at 09:01:54AM +0900, Minchan Kim wrote:
> On Mon, Nov 8, 2010 at 7:14 AM, Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
> > The statistic counters are in units of pages, there is no reason to
> > make them 64-bit wide on 32-bit machines.
> >
> > Make them native words.  Since they are signed, this leaves 31 bit on
> > 32-bit machines, which can represent roughly 8TB assuming a page size
> > of 4k.
> >
> > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>
>
> This patch changes mem_cgroup_recursive_idx_stat with
> mem_cgroup_recursive_stat as well.
> As you know, It would be better to be another patch although it's
> trivial. But I don't mind it.
> I like the name. :)

I also feel that it's not too nice to mix such cleanups with
functionality changes. But I found the name too appalling to leave it
alone, and a separate patch not worth the trouble.

If somebody has strong feelings, I will happily split it up.

Thanks for your review, Minchan.

Hannes
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