Re: [patch 1/4] memcg: use native word to represent dirtyable pages

[Minchan Kim]

On Mon, Nov 8, 2010 at 7:14 AM, Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
> The memory cgroup dirty info calculation currently uses a signed
> 64-bit type to represent the amount of dirtyable memory in pages.
>
> This can instead be changed to an unsigned word, which will allow the
> formula to function correctly with up to 160G of LRU pages on a 32-bit
> system, assuming 4k pages.  That should be plenty even when taking
> racy folding of the per-cpu counters into account.
>
> This fixes a compilation error on 32-bit systems as this code tries to
> do 64-bit division.
>
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Reported-by: Dave Young <hidave.darkstar@xxxxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>


-- 
Kind regards,
Minchan Kim
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