Commit 860b3272 authored by Alex Shi's avatar Alex Shi Committed by Linus Torvalds

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.
Signed-off-by: default avatarAlex Shi <alex.shi@linux.alibaba.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Reviewed-by: default avatarAlexander Duyck <alexander.h.duyck@linux.intel.com>
Link: http://lkml.kernel.org/r/3bd60e1b-a74e-050d-ade4-6e8f54e00b92@linux.alibaba.comSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d34c0a75
...@@ -536,6 +536,7 @@ struct zone { ...@@ -536,6 +536,7 @@ struct zone {
* On compaction failure, 1<<compact_defer_shift compactions * On compaction failure, 1<<compact_defer_shift compactions
* are skipped before trying again. The number attempted since * are skipped before trying again. The number attempted since
* last failure is tracked with compact_considered. * last failure is tracked with compact_considered.
* compact_order_failed is the minimum compaction failed order.
*/ */
unsigned int compact_considered; unsigned int compact_considered;
unsigned int compact_defer_shift; unsigned int compact_defer_shift;
......
...@@ -154,7 +154,7 @@ EXPORT_SYMBOL(__ClearPageMovable); ...@@ -154,7 +154,7 @@ EXPORT_SYMBOL(__ClearPageMovable);
/* /*
* Compaction is deferred when compaction fails to result in a page * 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 * to a limit of 1 << COMPACT_MAX_DEFER_SHIFT
*/ */
void defer_compaction(struct zone *zone, int order) void defer_compaction(struct zone *zone, int order)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment