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| author | Mel Gorman <mgorman@suse.de> | 2014-01-21 15:49:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-21 16:19:44 -0800 |
| commit | aec6a8889a98a0cd58357cd0937a25189908f191 (patch) | |
| tree | 4c0bd0fa7a3d9e6edc0f863782e1d5807ebefb12 /mm/page_alloc.c | |
| parent | ece86e222db48d04bda218a2be70e384518bb08c (diff) | |
| download | linux-0-day-aec6a8889a98a0cd58357cd0937a25189908f191.tar.gz linux-0-day-aec6a8889a98a0cd58357cd0937a25189908f191.tar.xz | |
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>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 89d81f4429caf..ec4417cb458a0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2072,13 +2072,6 @@ void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...) return; /* - * Walking all memory to count page types is very expensive and should - * be inhibited in non-blockable contexts. - */ - if (!(gfp_mask & __GFP_WAIT)) - filter |= SHOW_MEM_FILTER_PAGE_COUNT; - - /* * This documents exceptions given to allocations in certain * contexts that are allowed to allocate outside current's set * of allowed nodes. |