This patch corrects the number of pages which are rotated on active list.
The counter for rotated pages effects the number of pages
to be scanned on active pages list in low memory situations.
Signed-off-by: Pradeep Goswami <pradeep.goswami@xxxxxxxxxxxxx>
Cc: Rebecca Schultz Zavin <rebecca@xxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/vmscan.c 2015-11-18 20:55:38.208838142 +0800
+++ b/mm/vmscan.c 2015-11-19 14:37:31.189838998 +0800
@@ -1806,7 +1806,6 @@ static void shrink_active_list(unsigned
if (page_referenced(page, 0, sc->target_mem_cgroup,
&vm_flags)) {
- nr_rotated += hpage_nr_pages(page);
/*
* Identify referenced, file-backed active pages and
* give them one more trip around the active list. So
@@ -1818,6 +1817,7 @@ static void shrink_active_list(unsigned
*/
if ((vm_flags & VM_EXEC) && page_is_file_cache(page)) {
list_add(&page->lru, &l_active);
+ nr_rotated += hpage_nr_pages(page);
continue;
}
}
Thanks,
Pradeep.
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