The patch titled
Subject: mm/compaction: correct the comments of compact_defer_shift
has been added to the -mm tree. Its filename is
mm-compaction-correct-the-comments-of-compact_defer_shift.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-compaction-correct-the-comments-of-compact_defer_shift.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-compaction-correct-the-comments-of-compact_defer_shift.patch
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------------------------------------------------------
From: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Subject: mm/compaction: correct the comments of compact_defer_shift
There is no compact_defer_limit. It should be compact_defer_shift in
use. and add compact_order_failed explanation.
Link: http://lkml.kernel.org/r/3bd60e1b-a74e-050d-ade4-6e8f54e00b92@xxxxxxxxxxxxxxxxx
Signed-off-by: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Reviewed-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 1 +
mm/compaction.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
--- a/include/linux/mmzone.h~mm-compaction-correct-the-comments-of-compact_defer_shift
+++ a/include/linux/mmzone.h
@@ -536,6 +536,7 @@ struct zone {
* On compaction failure, 1<<compact_defer_shift compactions
* are skipped before trying again. The number attempted since
* last failure is tracked with compact_considered.
+ * compact_order_failed is the minimum compaction failed order.
*/
unsigned int compact_considered;
unsigned int compact_defer_shift;
--- a/mm/compaction.c~mm-compaction-correct-the-comments-of-compact_defer_shift
+++ a/mm/compaction.c
@@ -154,7 +154,7 @@ EXPORT_SYMBOL(__ClearPageMovable);
/*
* Compaction is deferred when compaction fails to result in a page
- * allocation success. 1 << compact_defer_limit compactions are skipped up
+ * allocation success. 1 << compact_defer_shift, compactions are skipped up
* to a limit of 1 << COMPACT_MAX_DEFER_SHIFT
*/
void defer_compaction(struct zone *zone, int order)
_
Patches currently in -mm which might be from alex.shi@xxxxxxxxxxxxxxxxx are
mm-compaction-correct-the-comments-of-compact_defer_shift.patch
