From: Wanpneg Li <liwp@xxxxxxxxxxxxxxxxxx>
Since bdi_update_bandwidth function should estimate write bandwidth at 200ms intervals,
so the time is bdi->bw_time_stamp + BANDWIDTH_INTERVAL == jiffies, but
if use time_is_after_eq_jiffies intervals will be bdi->bw_time_stamp +
BANDWIDTH_INTERVAL + 1.
Signed-off-by: Wanpeng Li <liwp@xxxxxxxxxxxxxxxxxx>
---
mm/page-writeback.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index c833bf0..099e225 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1032,7 +1032,7 @@ static void bdi_update_bandwidth(struct backing_dev_info *bdi,
unsigned long bdi_dirty,
unsigned long start_time)
{
- if (time_is_after_eq_jiffies(bdi->bw_time_stamp + BANDWIDTH_INTERVAL))
+ if (time_is_after_jiffies(bdi->bw_time_stamp + BANDWIDTH_INTERVAL))
return;
spin_lock(&bdi->wb.list_lock);
__bdi_update_bandwidth(bdi, thresh, bg_thresh, dirty,
--
1.7.9.5
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