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writeback: fix bdi_writeback iteration in wakeup_dirtytime_writeback() 

wakeup_dirtytime_writeback() walks and wakes up all wb's of all bdi's;
unfortunately, it was always waking up bdi->wb instead of the wb being
walked.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 001fe6f617 ("writeback: make wakeup_dirtytime_writeback() handle multiple bdi_writeback's")
Reviewed-by: Jan Kara <jack@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Tejun Heo 2015-09-29 12:47:51 -04:00 committed by Jens Axboe
parent 9ad18ab938
commit 6fdf860f15
1 changed files with 2 additions and 2 deletions
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4
fs/fs-writeback.c
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@ -1897,8 +1897,8 @@ static void wakeup_dirtytime_writeback(struct work_struct *w)
struct wb_iter iter;
bdi_for_each_wb(wb, bdi, &iter, 0)
if (!list_empty(&bdi->wb.b_dirty_time))
wb_wakeup(&bdi->wb);
if (!list_empty(&wb->b_dirty_time))
wb_wakeup(wb);
}
rcu_read_unlock();
schedule_delayed_work(&dirtytime_work, dirtytime_expire_interval * HZ);