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-rw-r--r--mm/page-writeback.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 5240e426c1f..945559fb63d 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -46,7 +46,7 @@
static long ratelimit_pages = 32;
static long total_pages; /* The total number of pages in the machine. */
-static int dirty_exceeded; /* Dirty mem may be over limit */
+static int dirty_exceeded __cacheline_aligned_in_smp; /* Dirty mem may be over limit */
/*
* When balance_dirty_pages decides that the caller needs to perform some
@@ -212,7 +212,8 @@ static void balance_dirty_pages(struct address_space *mapping)
if (nr_reclaimable + wbs.nr_writeback <= dirty_thresh)
break;
- dirty_exceeded = 1;
+ if (!dirty_exceeded)
+ dirty_exceeded = 1;
/* Note: nr_reclaimable denotes nr_dirty + nr_unstable.
* Unstable writes are a feature of certain networked
@@ -234,7 +235,7 @@ static void balance_dirty_pages(struct address_space *mapping)
blk_congestion_wait(WRITE, HZ/10);
}
- if (nr_reclaimable + wbs.nr_writeback <= dirty_thresh)
+ if (nr_reclaimable + wbs.nr_writeback <= dirty_thresh && dirty_exceeded)
dirty_exceeded = 0;
if (writeback_in_progress(bdi))