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-rw-r--r--mm/compaction.c5
-rw-r--r--mm/page_alloc.c12
2 files changed, 2 insertions, 15 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 1fc6736815e0..75f4c1206d00 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1298,15 +1298,13 @@ int sysctl_extfrag_threshold = 500;
* @mode: The migration mode for async, sync light, or sync migration
* @contended: Return value that determines if compaction was aborted due to
* need_resched() or lock contention
- * @candidate_zone: Return the zone where we think allocation should succeed
*
* This is the main entry point for direct page compaction.
*/
unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *nodemask,
enum migrate_mode mode, int *contended,
- int alloc_flags, int classzone_idx,
- struct zone **candidate_zone)
+ int alloc_flags, int classzone_idx)
{
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
int may_enter_fs = gfp_mask & __GFP_FS;
@@ -1343,7 +1341,6 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
/* If a normal allocation would succeed, stop compacting */
if (zone_watermark_ok(zone, order, low_wmark_pages(zone),
classzone_idx, alloc_flags)) {
- *candidate_zone = zone;
/*
* We think the allocation will succeed in this zone,
* but it is not certain, hence the false. The caller
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e32121fa2ba9..edb0ce1e7cf3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2330,7 +2330,6 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
int classzone_idx, int migratetype, enum migrate_mode mode,
int *contended_compaction, bool *deferred_compaction)
{
- struct zone *last_compact_zone = NULL;
unsigned long compact_result;
struct page *page;
@@ -2341,8 +2340,7 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
compact_result = try_to_compact_pages(zonelist, order, gfp_mask,
nodemask, mode,
contended_compaction,
- alloc_flags, classzone_idx,
- &last_compact_zone);
+ alloc_flags, classzone_idx);
current->flags &= ~PF_MEMALLOC;
switch (compact_result) {
@@ -2380,14 +2378,6 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
}
/*
- * last_compact_zone is where try_to_compact_pages thought allocation
- * should succeed, so it did not defer compaction. But here we know
- * that it didn't succeed, so we do the defer.
- */
- if (last_compact_zone && mode != MIGRATE_ASYNC)
- defer_compaction(last_compact_zone, order);
-
- /*
* It's bad if compaction run occurs and fails. The most likely reason
* is that pages exist, but not enough to satisfy watermarks.
*/