From: David Rientjes <rientjes@google.com>
To: Mel Gorman <mgorman@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Tony Luck <tony.luck@intel.com>,
Russell King <linux@arm.linux.org.uk>,
James Bottomley <jejb@parisc-linux.org>,
linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org,
linux-parisc@vger.kernel.org, Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm, show_mem: Remove SHOW_MEM_FILTER_PAGE_COUNT
Date: Tue, 3 Dec 2013 15:41:38 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.02.1312031541240.5946@chino.kir.corp.google.com> (raw)
In-Reply-To: <20131203145721.GQ11295@suse.de>
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@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Thanks!
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next prev parent reply other threads:[~2013-12-03 23:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-16 10:42 [PATCH] mm: Do not walk all of system memory during show_mem Mel Gorman
2013-10-17 1:11 ` David Rientjes
2013-11-04 10:08 ` Mel Gorman
2013-12-03 14:57 ` [PATCH] mm, show_mem: Remove SHOW_MEM_FILTER_PAGE_COUNT Mel Gorman
2013-12-03 23:41 ` David Rientjes [this message]
2013-10-31 4:55 ` [PATCH] mm: Do not walk all of system memory during show_mem KOSAKI Motohiro
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