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| author | Johannes Weiner <hannes@cmpxchg.org> | 2013-09-11 14:20:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:57:22 -0700 |
| commit | e085dbc52fad8d79fa2245339c84bf3ef0b3a802 (patch) | |
| tree | b6793560ebcfd6e878e37dc851ff06a63926fed6 /mm/page_alloc.c | |
| parent | 892f795df1eb119b560a3ee5a1ca3f385a852e84 (diff) | |
| download | kernel-common-e085dbc52fad8d79fa2245339c84bf3ef0b3a802.tar.gz kernel-common-e085dbc52fad8d79fa2245339c84bf3ef0b3a802.tar.bz2 kernel-common-e085dbc52fad8d79fa2245339c84bf3ef0b3a802.zip | |
mm: page_alloc: rearrange watermark checking in get_page_from_freelist
Allocations that do not have to respect the watermarks are rare
high-priority events. Reorder the code such that per-zone dirty limits
and future checks important only to regular page allocations are ignored
in these extraordinary situations.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Paul Bolle <paul.bollee@gmail.com>
Tested-by: Zlatko Calusic <zcalusic@bitsync.net>
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 | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8c68ef13cefa..9884aa0f233a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1889,12 +1889,17 @@ zonelist_scan: */ for_each_zone_zonelist_nodemask(zone, z, zonelist, high_zoneidx, nodemask) { + unsigned long mark; + if (IS_ENABLED(CONFIG_NUMA) && zlc_active && !zlc_zone_worth_trying(zonelist, z, allowednodes)) continue; if ((alloc_flags & ALLOC_CPUSET) && !cpuset_zone_allowed_softwall(zone, gfp_mask)) continue; + BUILD_BUG_ON(ALLOC_NO_WATERMARKS < NR_WMARK); + if (alloc_flags & ALLOC_NO_WATERMARKS) + goto try_this_zone; /* * When allocating a page cache page for writing, we * want to get it from a zone that is within its dirty @@ -1925,16 +1930,11 @@ zonelist_scan: (gfp_mask & __GFP_WRITE) && !zone_dirty_ok(zone)) goto this_zone_full; - BUILD_BUG_ON(ALLOC_NO_WATERMARKS < NR_WMARK); - if (!(alloc_flags & ALLOC_NO_WATERMARKS)) { - unsigned long mark; + mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK]; + if (!zone_watermark_ok(zone, order, mark, + classzone_idx, alloc_flags)) { int ret; - mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK]; - if (zone_watermark_ok(zone, order, mark, - classzone_idx, alloc_flags)) - goto try_this_zone; - if (IS_ENABLED(CONFIG_NUMA) && !did_zlc_setup && nr_online_nodes > 1) { /* |