The patch titled
mm: filter unevictable page out in deactivate_page()
has been removed from the -mm tree. Its filename was
mm-filter-unevictable-page-out-in-deactivate_page.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mm: filter unevictable page out in deactivate_page()
From: Minchan Kim <minchan.kim@xxxxxxxxx>
It's pointless that deactive_page's operates on unevictable pages. This
patch removes unnecessary overhead which might be a bit problem in case
that there are many unevictable page in system(ex, mprotect workload)
[akpm@xxxxxxxxxxxxxxxxxxxx: tidy up comment]
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx>
Reviewed-by: Rik van Riel<riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN mm/swap.c~mm-filter-unevictable-page-out-in-deactivate_page mm/swap.c
--- a/mm/swap.c~mm-filter-unevictable-page-out-in-deactivate_page
+++ a/mm/swap.c
@@ -476,6 +476,13 @@ static void drain_cpu_pagevecs(int cpu)
*/
void deactivate_page(struct page *page)
{
+ /*
+ * In a workload with many unevictable page such as mprotect, unevictable
+ * page deactivation for accelerating reclaim is pointless.
+ */
+ if (PageUnevictable(page))
+ return;
+
if (likely(get_page_unless_zero(page))) {
struct pagevec *pvec = &get_cpu_var(lru_deactivate_pvecs);
_
Patches currently in -mm which might be from minchan.kim@xxxxxxxxx are
origin.patch
linux-next.patch
writeback-split-inode_wb_list_lock-into-bdi_writebacklist_lock.patch
writeback-split-inode_wb_list_lock-into-bdi_writebacklist_lock-fix.patch
writeback-split-inode_wb_list_lock-into-bdi_writebacklist_lock-fix-fix.patch
writeback-split-inode_wb_list_lock-into-bdi_writebacklist_lock-fix-fix-fix.patch
writeback-elevate-queue_io-into-wb_writeback.patch
mm-move-enum-vm_event_item-into-a-standalone-header-file.patch
memcg-count-the-soft_limit-reclaim-in-global-background-reclaim.patch
memcg-add-the-soft_limit-reclaim-in-global-direct-reclaim.patch
memcg-rename-mem_cgroup_zone_nr_pages-to-mem_cgroup_zone_nr_lru_pages.patch
memcg-add-memorynumastat-api-for-numa-statistics.patch
memcg-add-memorynumastat-api-for-numa-statistics-v5.patch
add-the-pagefault-count-into-memcg-stats.patch
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