[PATCH 22/45] writeback: show bdi write bandwidth in debugfs

[Wu Fengguang]

CC: Theodore Ts'o <tytso@xxxxxxx>
CC: Jan Kara <jack@xxxxxxx> 
CC: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> 
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
 mm/backing-dev.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- linux.orig/mm/backing-dev.c	2009-10-06 23:38:44.000000000 +0800
+++ linux/mm/backing-dev.c	2009-10-06 23:38:44.000000000 +0800
@@ -93,6 +93,7 @@ static int bdi_debug_stats_show(struct s
 		   "BdiDirtyThresh:   %8lu kB\n"
 		   "DirtyThresh:      %8lu kB\n"
 		   "BackgroundThresh: %8lu kB\n"
+		   "WriteBandwidth:   %8lu kBps\n"
 		   "WriteBack threads:%8lu\n"
 		   "b_dirty:          %8lu\n"
 		   "b_io:             %8lu\n"
@@ -104,8 +105,9 @@ static int bdi_debug_stats_show(struct s
 		   "wb_cnt:           %8u\n",
 		   (unsigned long) K(bdi_stat(bdi, BDI_WRITEBACK)),
 		   (unsigned long) K(bdi_stat(bdi, BDI_RECLAIMABLE)),
-		   K(bdi_thresh), K(dirty_thresh),
-		   K(background_thresh), nr_wb, nr_dirty, nr_io, nr_more_io,
+		   K(bdi_thresh), K(dirty_thresh), K(background_thresh),
+		   (unsigned long) K(bdi->write_bandwidth),
+		   nr_wb, nr_dirty, nr_io, nr_more_io,
 		   !list_empty(&bdi->bdi_list), bdi->state, bdi->wb_mask,
 		   !list_empty(&bdi->wb_list), bdi->wb_cnt);
 #undef K


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