Re: [PATCH] show per-process swap usage via procfs

From: Christoph Lameter
Date: Thu Nov 05 2009 - 12:54:45 EST

On Thu, 5 Nov 2009, KOSAKI Motohiro wrote:

> > On Wed, 4 Nov 2009, KAMEZAWA Hiroyuki wrote:
> >
> > > Now, anon_rss and file_rss is counted as RSS and exported via /proc.
> > > RSS usage is important information but one more information which
> > > is often asked by users is "usage of swap".(user support team said.)
> >
> > Hmmm... Could we do some rework of the counters first so that they are per
> > cpu?
> per-cpu swap counter?
> It seems overkill effort....

The other alternative is to use atomic ops which are significantly slower
and have an impact on critical sections.

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