linux-kernel - Re: [patch -rss] Make RSS accounting display more user friendly

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Message-ID: <6599ad830706220839h2a556c76he11b78c2c4cdb86e@mail.gmail.com>
Date:	Fri, 22 Jun 2007 08:39:50 -0700
From:	"Paul Menage" <menage@...gle.com>
To:	"Pavel Emelianov" <xemul@...nvz.org>
Cc:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>,
	"Andrew Morton" <akpm@...l.org>,
	"Linux Containers" <containers@...ts.osdl.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [patch -rss] Make RSS accounting display more user friendly

On 6/21/07, Pavel Emelianov <xemul@...nvz.org> wrote:
>
> Nothing wrong, but currently they are shown in "natural" points, i.e. in
> those that the controller accounts them in. For RSS controller the natural
> point is "page", but auto-converting them from pages to bytes is wrong, as
> not all the controllers account in pages.

This exposes more implementation detail than I think is good.
Something like a memory controller should use a more abstract
interface like bytes, and do the conversion to/from its internal
"natural" units like pages internally. E.g. the example cpu accounting
controller that I included with my patch set reports usage in
milliseconds, even though it counts internally in jiffies.

Paul
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