The patch titled
Subject: mm: compaction: push isolate search base of compact control one pfn ahead
has been added to the -mm tree. Its filename is
mm-compaction-push-isolate-search-base-of-compact-control-one-pfn-ahead.patch
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------------------------------------------------------
From: Hillf Danton <dhillf@xxxxxxxxx>
Subject: mm: compaction: push isolate search base of compact control one pfn ahead
After isolated the current pfn will no longer be scanned and isolated if
the next round is necessary, so push the isolate_migratepages search base
of the given compact_control one step ahead.
Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN mm/compaction.c~mm-compaction-push-isolate-search-base-of-compact-control-one-pfn-ahead mm/compaction.c
--- a/mm/compaction.c~mm-compaction-push-isolate-search-base-of-compact-control-one-pfn-ahead
+++ a/mm/compaction.c
@@ -365,8 +365,10 @@ static isolate_migrate_t isolate_migrate
nr_isolated++;
/* Avoid isolating too much */
- if (cc->nr_migratepages == COMPACT_CLUSTER_MAX)
+ if (cc->nr_migratepages == COMPACT_CLUSTER_MAX) {
+ ++low_pfn;
break;
+ }
}
acct_isolated(zone, cc);
_
Subject: Subject: mm: compaction: push isolate search base of compact control one pfn ahead
Patches currently in -mm which might be from dhillf@xxxxxxxxx are
linux-next.patch
hugetlb-detect-race-upon-page-allocation-failure-during-cow.patch
hugetlb-clarify-hugetlb_instantiation_mutex-usage.patch
mm-compaction-push-isolate-search-base-of-compact-control-one-pfn-ahead.patch
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