If compact_order_failed is initialized to 0 and order-9
compaction is continually failed, defer counter will be updated
to activate deferring. Although other defer counters will be properly
updated, compact_order_failed will not be updated because failed order
cannot be lower than compact_order_failed, 0. In this case,
low order compaction such as 2, 3 could be deferred due to
this wrongly initialized compact_order_failed value. This patch
removes this possibility by initializing it to MAX_ORDER.
Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
---
mm/page_alloc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d0499ff..7002c66 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5273,6 +5273,9 @@ static void __paginginit free_area_init_core(struct
pglist_data *pgdat)
zone_seqlock_init(zone);
zone->zone_pgdat = pgdat;
zone_pcp_init(zone);
+#ifdef CONFIG_COMPACTION
+ zone->compact_order_failed = MAX_ORDER;
+#endif
/* For bootup, initialized properly in watermark setup */
mod_zone_page_state(zone, NR_ALLOC_BATCH, zone->managed_pages);
--
1.9.1
--
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