The patch titled
vmscan: avoid setting zone congested if no page dirty
has been removed from the -mm tree. Its filename was
vmscan-avoid-set-zone-congested-if-no-page-dirty.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: vmscan: avoid setting zone congested if no page dirty
From: Shaohua Li <shaohua.li@xxxxxxxxx>
nr_dirty and nr_congested are increased only when the page is dirty. So
if all pages are clean, both them will be zero. In this case, we should
not mark the zone congested.
Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
Reviewed-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>
Acked-by: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/vmscan.c~vmscan-avoid-set-zone-congested-if-no-page-dirty mm/vmscan.c
--- a/mm/vmscan.c~vmscan-avoid-set-zone-congested-if-no-page-dirty
+++ a/mm/vmscan.c
@@ -913,7 +913,7 @@ keep_lumpy:
* back off and wait for congestion to clear because further reclaim
* will encounter the same problem
*/
- if (nr_dirty == nr_congested)
+ if (nr_dirty == nr_congested && nr_dirty != 0)
zone_set_flag(zone, ZONE_CONGESTED);
free_page_list(&free_pages);
_
Patches currently in -mm which might be from shaohua.li@xxxxxxxxx are
mm-page-allocator-adjust-the-per-cpu-counter-threshold-when-memory-is-low.patch
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