The patch titled
mm: filter unevictable page out in deactivate_page()
has been added to the -mm tree. Its filename is
mm-filter-unevictable-page-out-in-deactivate_page.patch
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------------------------------------------------------
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)
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 | 9 +++++++++
1 file changed, 9 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 +476,15 @@ static void drain_cpu_pagevecs(int cpu)
*/
void deactivate_page(struct page *page)
{
+
+ /*
+ * In workload which system has many unevictable page(ex, 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
mm-check-pageunevictable-in-lru_deactivate_fn.patch
linux-next.patch
mm-introduce-wait_on_page_locked_killable.patch
x86mm-make-pagefault-killable.patch
mm-mem-hotplug-fix-section-mismatch-setup_per_zone_inactive_ratio-should-be-__meminit.patch
mm-mem-hotplug-recalculate-lowmem_reserve-when-memory-hotplug-occur.patch
oom-replace-pf_oom_origin-with-toggling-oom_score_adj.patch
oom-replace-pf_oom_origin-with-toggling-oom_score_adj-update.patch
mm-thp-optimize-memcg-charge-in-khugepaged.patch
readahead-readahead-page-allocations-are-ok-to-fail.patch
vmscan-change-shrink_slab-interfaces-by-passing-shrink_control.patch
vmscan-change-shrink_slab-interfaces-by-passing-shrink_control-fix.patch
vmscan-change-shrink_slab-interfaces-by-passing-shrink_control-fix-2.patch
vmscan-change-shrinker-api-by-passing-shrink_control-struct.patch
vmscan-change-shrinker-api-by-passing-shrink_control-struct-fix.patch
vmscan-change-shrinker-api-by-passing-shrink_control-struct-fix-2.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-filter-unevictable-page-out-in-deactivate_page.patch
mm-filter-unevictable-page-out-in-deactivate_page-fix.patch
mm-batch-activate_page-to-reduce-lock-contention.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-stats-to-monitor-soft_limit-reclaim.patch
add-the-pagefault-count-into-memcg-stats.patch
add-the-pagefault-count-into-memcg-stats-fix.patch
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