From f2b65121607631df0753eedd624262818707af32 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Fri, 22 May 2015 17:13:55 -0400
Subject: [PATCH] writeback: make wakeup_flusher_threads() handle multiple
 bdi_writeback's

wakeup_flusher_threads() currently only starts writeback on the root
wb (bdi_writeback).  For cgroup writeback support, update the function
to wake up all wbs and distribute the number of pages to write
according to the proportion of each wb's write bandwidth, which is
implemented in wb_split_bdi_pages().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
Reading git-format-patch failed