From: Pavel Machek <pavel@ucw.cz>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"hugh.dickins@tiscali.co.uk" <hugh.dickins@tiscali.co.uk>,
akpm@linux-foundation.org
Subject: Re: [PATCH] show per-process swap usage via procfs
Date: Sun, 8 Nov 2009 18:04:53 +0100 [thread overview]
Message-ID: <20091108170453.GA1372@ucw.cz> (raw)
In-Reply-To: <alpine.DEB.1.10.0911051003060.25718@V090114053VZO-1>
On Thu 2009-11-05 10:04:01, Christoph Lameter wrote:
> 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.
...but compared to disk i/o, overhead should be almost zero, right?
Keep it simple...
Pavel
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next prev parent reply other threads:[~2009-11-08 17:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-04 6:24 KAMEZAWA Hiroyuki
2009-11-04 19:15 ` Christoph Lameter
2009-11-04 23:25 ` KOSAKI Motohiro
2009-11-05 2:28 ` KAMEZAWA Hiroyuki
2009-11-05 15:04 ` Christoph Lameter
2009-11-08 17:04 ` Pavel Machek [this message]
2009-11-05 0:06 ` KAMEZAWA Hiroyuki
2009-11-05 5:16 ` [RFC][PATCH] lib: generic percpu counter array KAMEZAWA Hiroyuki
2009-11-05 15:15 ` Christoph Lameter
2009-11-06 0:49 ` KAMEZAWA Hiroyuki
2009-11-05 15:20 ` Christoph Lameter
2009-11-06 0:56 ` KAMEZAWA Hiroyuki
2009-11-05 14:41 ` [PATCH] show per-process swap usage via procfs KOSAKI Motohiro
2009-11-05 15:11 ` Minchan Kim
2009-11-05 23:48 ` KAMEZAWA Hiroyuki
2009-11-06 4:40 ` [PATCH] show per-process swap usage via procfs v2 KAMEZAWA Hiroyuki
2009-11-06 15:19 ` Minchan Kim
2009-11-11 2:25 ` [PATCH] show per-process swap usage via procfs v3 KAMEZAWA Hiroyuki
2009-11-12 15:20 ` Christoph Lameter
2009-11-13 1:51 ` KAMEZAWA Hiroyuki
2009-11-13 2:35 ` KAMEZAWA Hiroyuki
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