Re: [PATCH 2/2] writeback: Adding pages_dirtied and pages_entered_writeback

[KOSAKI Motohiro]

> On Thu, Aug 5, 2010 at 4:56 PM, KOSAKI Motohiro
> <kosaki.motohiro@xxxxxxxxxxxxxx> wrote:
> > /proc/vmstat already have both.
> >
> > cat /proc/vmstat |grep nr_dirty
> > cat /proc/vmstat |grep nr_writeback
> >
> > Also, /sys/devices/system/node/node0/meminfo show per-node stat.
> >
> > Perhaps, I'm missing your point.
> 
> These only show the number of dirty pages present in the system at the
> point they are queried.
> The counter I am trying to add are increasing over time. They allow
> developers to see rates of pages being dirtied and entering writeback.
> Which is very helpful.

Usually administrators get the data two times and subtract them. Isn't it sufficient?


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