Re: [PATCH v3 04/13] mm: Track NR_KERNEL_STACK in KiB instead of number of stacks

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On Mon, Jun 20, 2016 at 04:43:34PM -0700, Andy Lutomirski wrote:
> Currently, NR_KERNEL_STACK tracks the number of kernel stacks in a
> zone.  This only makes sense if each kernel stack exists entirely in
> one zone, and allowing vmapped stacks could break this assumption.
> 
> Since frv has THREAD_SIZE < PAGE_SIZE, we need to track kernel stack
> allocations in a unit that divides both THREAD_SIZE and PAGE_SIZE on
> all architectures.  Keep it simple and use KiB.
> 
> Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>

Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
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