diff options
| -rw-r--r-- | mm/vmscan.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 3ad66580b8b4..1860bfab02c5 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3103,11 +3103,11 @@ static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order, int classzone_idx) if (!managed_zone(zone)) continue; - if (!zone_balanced(zone, order, classzone_idx)) - return false; + if (zone_balanced(zone, order, classzone_idx)) + return true; } - return true; + return false; } /* @@ -3304,7 +3304,13 @@ static void kswapd_try_to_sleep(pg_data_t *pgdat, int alloc_order, int reclaim_o prepare_to_wait(&pgdat->kswapd_wait, &wait, TASK_INTERRUPTIBLE); - /* Try to sleep for a short interval */ + /* + * Try to sleep for a short interval. Note that kcompactd will only be + * woken if it is possible to sleep for a short interval. This is + * deliberate on the assumption that if reclaim cannot keep an + * eligible zone balanced that it's also unlikely that compaction will + * succeed. + */ if (prepare_kswapd_sleep(pgdat, reclaim_order, classzone_idx)) { /* * Compaction records what page blocks it recently failed to |