From f7d2b1ecd0c714adefc7d3a942ef87beb828a763 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 8 Dec 2010 22:44:24 -0600
Subject: writeback: account per-bdi accumulated written pages

Introduce the BDI_WRITTEN counter. It will be used for estimating the
bdi's write bandwidth.

Peter Zijlstra <a.p.zijlstra@chello.nl>:
Move BDI_WRITTEN accounting into __bdi_writeout_inc().
This will cover and fix fuse, which only calls bdi_writeout_inc().

CC: Michael Rubin <mrubin@google.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
---
 mm/page-writeback.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'mm/page-writeback.c')

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 9d6ac2b6d94..8cd71376c63 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -219,6 +219,7 @@ int dirty_bytes_handler(struct ctl_table *table, int write,
  */
 static inline void __bdi_writeout_inc(struct backing_dev_info *bdi)
 {
+	__inc_bdi_stat(bdi, BDI_WRITTEN);
 	__prop_inc_percpu_max(&vm_completions, &bdi->completions,
 			      bdi->max_prop_frac);
 }
-- 
cgit v1.2.3-70-g09d2