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writeback: account per-bdi accumulated written pages

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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>
This commit is contained in:
Jan Kara 2010-12-08 22:44:24 -06:00 • committed by Wu Fengguang
parent d46db3d582
commit f7d2b1ecd0
3 changed files with 10 additions and 2 deletions
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10
mm/backing-dev.c
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@ -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