Likewise shrink_lruvec[1], madvise_pageout could get the benefit
from per-task block plug.
[1] 3da367c3e5fc, vmscan: add block plug for page reclaim
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
---
mm/vmscan.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index fb9584641ac7..cf11113f6adb 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2556,6 +2556,7 @@ unsigned long reclaim_pages(struct list_head *page_list)
struct reclaim_stat dummy_stat;
struct page *page;
unsigned int noreclaim_flag;
+ struct blk_plug plug;
struct scan_control sc = {
.gfp_mask = GFP_KERNEL,
.may_writepage = 1,
@@ -2564,6 +2565,7 @@ unsigned long reclaim_pages(struct list_head *page_list)
.no_demotion = 1,
};
+ blk_start_plug(&plug);
noreclaim_flag = memalloc_noreclaim_save();
while (!list_empty(page_list)) {
@@ -2603,6 +2605,8 @@ unsigned long reclaim_pages(struct list_head *page_list)
}
memalloc_noreclaim_restore(noreclaim_flag);
+ blk_finish_plug(&plug);
+
return nr_reclaimed;
}
--
2.34.1.173.g76aa8bc2d0-goog
