On Mon, Sep 13, 2010 at 2:20 PM, Andrew Morton
<akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Sun, 12 Sep 2010 22:58:11 -0700
> Michael Rubin <mrubin@xxxxxxxxxx> wrote:
>
>> 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@xxxxxxxxxx>
>> Reviewed-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
>> ---
>> include/linux/mmzone.h | 2 ++
>> mm/page-writeback.c | 2 ++
>> mm/vmstat.c | 3 +++
>> 3 files changed, 7 insertions(+), 0 deletions(-)
>>
>> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
>> index 6e6e626..d0d7454 100644
>> --- a/include/linux/mmzone.h
>> +++ b/include/linux/mmzone.h
>> @@ -104,6 +104,8 @@ enum zone_stat_item {
>> NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */
>> NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */
>> NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */
>> + NR_FILE_DIRTIED, /* accumulated dirty pages */
>> + NR_WRITTEN, /* accumulated written pages */
>
> I think we can make those comments less ambiguous>
>
> --- a/include/linux/mmzone.h
> +++ a/include/linux/mmzone.h
> @@ -104,8 +104,8 @@ enum zone_stat_item {
> NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */
> NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */
> NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */
> - NR_FILE_DIRTIED, /* accumulated dirty pages */
> - NR_WRITTEN, /* accumulated written pages */
> + NR_FILE_DIRTIED, /* page dirtyings since bootup */
> + NR_WRITTEN, /* page writings since bootup */
Got it. Will fix.
> The mismatch between "NR_FILE_DIRTIED" and "nr_dirtied" is a bit, umm,
> dirty. I can kinda see the logic in the naming but still..
Got it will fix.
mrubin
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