diff options
| author | Jan Kara <jack@suse.cz> | 2010-12-09 05:44:24 +0100 |
|---|---|---|
| committer | Wu Fengguang <fengguang.wu@intel.com> | 2011-07-10 07:09:01 +0200 |
| commit | f7d2b1ecd0c714adefc7d3a942ef87beb828a763 (patch) | |
| tree | 7c5adb0abd73d3ad449b94698dadbaceb573a6f4 | |
| parent | writeback: make writeback_control.nr_to_write straight (diff) | |
| download | linux-f7d2b1ecd0c714adefc7d3a942ef87beb828a763.tar.xz linux-f7d2b1ecd0c714adefc7d3a942ef87beb828a763.zip | |
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>
| -rw-r--r-- | include/linux/backing-dev.h | 1 | ||||
| -rw-r--r-- | mm/backing-dev.c | 10 | ||||
| -rw-r--r-- | mm/page-writeback.c | 1 |
3 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 47feb2c4706a..469d56443c63 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -40,6 +40,7 @@ typedef int (congested_fn)(void *, int); enum bdi_stat_item { BDI_RECLAIMABLE, BDI_WRITEBACK, + BDI_WRITTEN, NR_BDI_STAT_ITEMS }; 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 diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 9d6ac2b6d942..8cd71376c63d 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); } |