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authorMel Gorman <mgorman@techsingularity.net>2015-11-06 16:28:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 17:50:42 -0800
commit974a786e63c96a2401a78ddba926f34c128474f1 (patch)
treec3551fdc6208bc2f764455cb73ad676a965a17e0 /mm/vmstat.c
parentf77cf4e4cc9d40310a7224a1a67c733aeec78836 (diff)
downloadop-kernel-dev-974a786e63c96a2401a78ddba926f34c128474f1.zip
op-kernel-dev-974a786e63c96a2401a78ddba926f34c128474f1.tar.gz
mm, page_alloc: remove MIGRATE_RESERVE
MIGRATE_RESERVE preserves an old property of the buddy allocator that existed prior to fragmentation avoidance -- min_free_kbytes worth of pages tended to remain contiguous until the only alternative was to fail the allocation. At the time it was discovered that high-order atomic allocations relied on this property so MIGRATE_RESERVE was introduced. A later patch will introduce an alternative MIGRATE_HIGHATOMIC so this patch deletes MIGRATE_RESERVE and supporting code so it'll be easier to review. Note that this patch in isolation may look like a false regression if someone was bisecting high-order atomic allocation failures. Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Vitaly Wool <vitalywool@gmail.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
-rw-r--r--mm/vmstat.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index ffcb4f5..5b289dc 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -923,7 +923,6 @@ static char * const migratetype_names[MIGRATE_TYPES] = {
"Unmovable",
"Reclaimable",
"Movable",
- "Reserve",
#ifdef CONFIG_CMA
"CMA",
#endif
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