To avoid excessive reclaim, we give up rebalancing for high order
allocations right after reclaiming enough pages.
Signed-off-by: Hillf Danton <hillf.zj@xxxxxxxxxxxxxxx>
---
mm/vmscan.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index ee7e531..d080fb2 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3159,8 +3159,7 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
do {
bool raise_priority = true;
-
- sc.nr_reclaimed = 0;
+ unsigned long reclaimed_pages = sc.nr_reclaimed;
/*
* If the number of buffer_heads in the machine exceeds the
@@ -3254,7 +3253,7 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int classzone_idx)
* Raise priority if scanning rate is too low or there was no
* progress in reclaiming pages
*/
- if (raise_priority || !sc.nr_reclaimed)
+ if (raise_priority || sc.nr_reclaimed == reclaimed_pages)
sc.priority--;
} while (sc.priority >= 1);
--
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>