Re: [PATCH] mm, show_mem: Remove SHOW_MEM_FILTER_PAGE_COUNT

[David Rientjes]

On Tue, 3 Dec 2013, Mel Gorman wrote:

> Commit 4b59e6c4 (mm, show_mem: suppress page counts in non-blockable
> contexts) introduced SHOW_MEM_FILTER_PAGE_COUNT to suppress PFN walks
> on large memory machines. Commit c78e9363 (mm: do not walk all of system
> memory during show_mem) avoided a PFN walk in the generic show_mem helper
> which removes the requirement for SHOW_MEM_FILTER_PAGE_COUNT in that case.
> 
> This patch removes PFN walkers from the arch-specific implementations that
> report on a per-node or per-zone granularity. ARM and unicore32 still do
> a PFN walk as they report memory usage on each bank which is a much finer
> granularity where the debugging information may still be of use. As the
> remaining arches doing PFN walks have relatively small amounts of memory,
> this patch simply removes SHOW_MEM_FILTER_PAGE_COUNT.
> 
> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>

Thanks!
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