mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT
authorMel Gorman <mgorman@suse.de>
Tue, 21 Jan 2014 23:49:13 +0000 (15:49 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 22 Jan 2014 00:19:44 +0000 (16:19 -0800)
commitaec6a8889a98a0cd58357cd0937a25189908f191
tree4c0bd0fa7a3d9e6edc0f863782e1d5807ebefb12
parentece86e222db48d04bda218a2be70e384518bb08c
mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT

Commit 4b59e6c47309 ("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 c78e93630d15 ("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.

[akpm@linux-foundation.org: fix parisc]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: James Bottomley <jejb@parisc-linux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/arm/mm/init.c
arch/ia64/mm/contig.c
arch/ia64/mm/discontig.c
arch/ia64/mm/init.c
arch/parisc/mm/init.c
arch/unicore32/mm/init.c
include/linux/mm.h
lib/show_mem.c
mm/page_alloc.c