[PATCH 4/4] mm: move most file-based accounting to the node -fix

Mel Gorman
2016-07-13T10:01:23Z

As noted by Johannes Weiner, NR_ZONE_WRITE_PENDING gets decremented twice
during migration instead of a dec(old) -> inc(new) cycle as intended.

This is a fix to mmotm patch
mm-move-most-file-based-accounting-to-the-node.patch

Note that it'll cause a conflict with
mm-vmstat-remove-zone-and-node-double-accounting-by-approximating-retries.patch
but that the resolution is trivial.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
---
mm/migrate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index c77997dc6ed7..ed0268268e93 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -515,7 +515,7 @@ int migrate_page_move_mapping(struct address_space *mapping,
__dec_node_state(oldzone->zone_pgdat, NR_FILE_DIRTY);
__dec_zone_state(oldzone, NR_ZONE_WRITE_PENDING);
__inc_node_state(newzone->zone_pgdat, NR_FILE_DIRTY);
- __dec_zone_state(newzone, NR_ZONE_WRITE_PENDING);
+ __inc_zone_state(newzone, NR_ZONE_WRITE_PENDING);
}
}
local_irq_enable();
--
2.6.4