path: root/mm/backing-dev.c
diff options
authorJan Kara <>2010-12-08 22:44:24 -0600
committerWu Fengguang <>2011-07-09 22:09:01 -0700
commitf7d2b1ecd0c714adefc7d3a942ef87beb828a763 (patch)
tree7c5adb0abd73d3ad449b94698dadbaceb573a6f4 /mm/backing-dev.c
parentd46db3d58233be4be980eb1e42eebe7808bcabab (diff)
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 <>: Move BDI_WRITTEN accounting into __bdi_writeout_inc(). This will cover and fix fuse, which only calls bdi_writeout_inc(). CC: Michael Rubin <> Reviewed-by: KOSAKI Motohiro <> Signed-off-by: Jan Kara <> Signed-off-by: Wu Fengguang <>
Diffstat (limited to 'mm/backing-dev.c')
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 7ba303be5e03..83f18a1d9d10 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -97,6 +97,7 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v)
"BdiDirtyThresh: %8lu kB\n"
"DirtyThresh: %8lu kB\n"
"BackgroundThresh: %8lu kB\n"
+ "BdiWritten: %8lu kB\n"
"b_dirty: %8lu\n"
"b_io: %8lu\n"
"b_more_io: %8lu\n"
@@ -104,8 +105,13 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v)
"state: %8lx\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_dirty, nr_io, nr_more_io,
+ K(bdi_thresh),
+ K(dirty_thresh),
+ K(background_thresh),
+ (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)),
+ nr_dirty,
+ nr_io,
+ nr_more_io,
!list_empty(&bdi->bdi_list), bdi->state);
#undef K