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writeback: add nr_dirtied and nr_written to /proc/vmstat

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To help developers and applications gain visibility into writeback
behaviour adding two entries to vm_stat_items and /proc/vmstat.  This will
allow us to track the "written" and "dirtied" counts.

   # grep nr_dirtied /proc/vmstat
   nr_dirtied 3747
   # grep nr_written /proc/vmstat
   nr_written 3618

Signed-off-by: Michael Rubin <mrubin@google.com>
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michael Rubin
2010-10-26 14:21:35 -07:00
committed by Linus Torvalds
parent f629d1c9bd
commit ea941f0e2a
3 changed files with 7 additions and 0 deletions
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mm/vmstat.c
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@@ -745,6 +745,9 @@ static const char * const vmstat_text[] = {
"nr_isolated_anon",
"nr_isolated_file",
"nr_shmem",
"nr_dirtied",
"nr_written",
#ifdef CONFIG_NUMA
"numa_hit",
"numa_miss",