Subject: + mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page.patch added to -mm tree
To: troy.zhangmingjun@xxxxxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,lauraa@xxxxxxxxxxxxxx,mgorman@xxxxxxx,minchan@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 05 Nov 2013 13:46:47 -0800
The patch titled
Subject: mm: cma: free cma page to buddy instead of being cpu hot page
has been added to the -mm tree. Its filename is
mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page.patch
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------------------------------------------------------
From: Mingjun Zhang <troy.zhangmingjun@xxxxxxxxxx>
Subject: mm: cma: free cma page to buddy instead of being cpu hot page
free_contig_range() frees cma pages one by one and MIGRATE_CMA pages will
be used as MIGRATE_MOVEABLE pages in the pcp list, it causes unnecessary
migration action when these pages reused by CMA.
Signed-off-by: Mingjun Zhang <troy.zhangmingjun@xxxxxxxxxx>
Cc: Laura Abbott <lauraa@xxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN mm/page_alloc.c~mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page mm/page_alloc.c
--- a/mm/page_alloc.c~mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page
+++ a/mm/page_alloc.c
@@ -1356,7 +1356,8 @@ void free_hot_cold_page(struct page *pag
* excessively into the page allocator
*/
if (migratetype >= MIGRATE_PCPTYPES) {
- if (unlikely(is_migrate_isolate(migratetype))) {
+ if (unlikely(is_migrate_isolate(migratetype))
+ || is_migrate_cma(migratetype))
free_one_page(zone, page, 0, migratetype);
goto out;
}
_
Patches currently in -mm which might be from troy.zhangmingjun@xxxxxxxxxx are
mm-cma-free-cma-page-to-buddy-instead-of-being-cpu-hot-page.patch
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