Commit 001fe6f6 authored May 22, 2015 by Tejun Heo Committed by Jens Axboe Jun 02, 2015

writeback: make wakeup_dirtytime_writeback() handle multiple bdi_writeback's

wakeup_dirtytime_writeback() currently only starts writeback on the
root wb (bdi_writeback).  For cgroup writeback support, update the
function to check all wbs.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent f2b65121

fs/fs-writeback.c

+6 −3

Original line number	Diff line number	Diff line
		@@ -1260,8 +1260,11 @@ static void wakeup_dirtytime_writeback(struct work_struct *w)

		rcu_read_lock();
		list_for_each_entry_rcu(bdi, &bdi_list, bdi_list) {
		if (list_empty(&bdi->wb.b_dirty_time))
		continue;
		struct bdi_writeback *wb;
		struct wb_iter iter;

		bdi_for_each_wb(wb, bdi, &iter, 0)
		if (!list_empty(&bdi->wb.b_dirty_time))
		wb_wakeup(&bdi->wb);
		}
		rcu_read_unlock();