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-rw-r--r--mm/vmscan.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 828530e2794a..adc7e9058181 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2570,7 +2570,7 @@ static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order, long remaining,
static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
int *classzone_idx)
{
- int all_zones_ok;
+ struct zone *unbalanced_zone;
unsigned long balanced;
int i;
int end_zone = 0; /* Inclusive. 0 = ZONE_DMA */
@@ -2604,7 +2604,7 @@ loop_again:
unsigned long lru_pages = 0;
int has_under_min_watermark_zone = 0;
- all_zones_ok = 1;
+ unbalanced_zone = NULL;
balanced = 0;
/*
@@ -2743,7 +2743,7 @@ loop_again:
}
if (!zone_balanced(zone, testorder, 0, end_zone)) {
- all_zones_ok = 0;
+ unbalanced_zone = zone;
/*
* We are still under min water mark. This
* means that we have a GFP_ATOMIC allocation
@@ -2776,7 +2776,7 @@ loop_again:
pfmemalloc_watermark_ok(pgdat))
wake_up(&pgdat->pfmemalloc_wait);
- if (all_zones_ok || (order && pgdat_balanced(pgdat, balanced, *classzone_idx)))
+ if (!unbalanced_zone || (order && pgdat_balanced(pgdat, balanced, *classzone_idx)))
break; /* kswapd: all done */
/*
* OK, kswapd is getting into trouble. Take a nap, then take
@@ -2786,7 +2786,7 @@ loop_again:
if (has_under_min_watermark_zone)
count_vm_event(KSWAPD_SKIP_CONGESTION_WAIT);
else
- congestion_wait(BLK_RW_ASYNC, HZ/10);
+ wait_iff_congested(unbalanced_zone, BLK_RW_ASYNC, HZ/10);
}
/*
@@ -2805,7 +2805,7 @@ out:
* high-order: Balanced zones must make up at least 25% of the node
* for the node to be balanced
*/
- if (!(all_zones_ok || (order && pgdat_balanced(pgdat, balanced, *classzone_idx)))) {
+ if (unbalanced_zone && (!order || !pgdat_balanced(pgdat, balanced, *classzone_idx))) {
cond_resched();
try_to_freeze();