diff options
| -rw-r--r-- | mm/compaction.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/compaction.c b/mm/compaction.c index b27802e04b91..021a2960ef9e 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -277,9 +277,27 @@ static unsigned long isolate_migratepages(struct zone *zone, } /* Time to isolate some pages for migration */ + cond_resched(); spin_lock_irq(&zone->lru_lock); for (; low_pfn < end_pfn; low_pfn++) { struct page *page; + bool locked = true; + + /* give a chance to irqs before checking need_resched() */ + if (!((low_pfn+1) % SWAP_CLUSTER_MAX)) { + spin_unlock_irq(&zone->lru_lock); + locked = false; + } + if (need_resched() || spin_is_contended(&zone->lru_lock)) { + if (locked) + spin_unlock_irq(&zone->lru_lock); + cond_resched(); + spin_lock_irq(&zone->lru_lock); + if (fatal_signal_pending(current)) + break; + } else if (!locked) + spin_lock_irq(&zone->lru_lock); + if (!pfn_valid_within(low_pfn)) continue; nr_scanned++; |