linux-kernel - Re: [PATCH 1/6] BC: kconfig

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Message-ID: <20060823130452.GA10449@martell.zuzino.mipt.ru>
Date:	Wed, 23 Aug 2006 17:04:52 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Kirill Korotaev <dev@...ru>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Pavel Emelianov <xemul@...nvz.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	Rik van Riel <riel@...hat.com>, Andi Kleen <ak@...e.de>,
	Greg KH <greg@...ah.com>, Oleg Nesterov <oleg@...sign.ru>,
	Matt Helsley <matthltc@...ibm.com>,
	Rohit Seth <rohitseth@...gle.com>,
	Chandra Seetharaman <sekharan@...ibm.com>
Subject: Re: [PATCH 1/6] BC: kconfig

On Wed, Aug 23, 2006 at 03:01:55PM +0400, Kirill Korotaev wrote:
> --- ./kernel/bc/Kconfig.bckm
> +++ ./kernel/bc/Kconfig
> @@ -0,0 +1,25 @@
> +#
> +# Resource beancounters (BC)
> +#
> +# Copyright (C) 2006 OpenVZ. SWsoft Inc
> +
> +menu "User resources"
> +
> +config BEANCOUNTERS
> +	bool "Enable resource accounting/control"
> +	default n
> +	help 
> +          This patch provides accounting and allows to configure
> +          limits for user's consumption of exhaustible system resources.

If BC will be merged there will be no patch, so text should be
rewritten slightly.

> +          The most important resource controlled by this patch is 
> unswappable +          memory (either mlock'ed or used by internal kernel 
> structures and +          buffers). The main goal of this patch is to 
> protect processes
> +          from running short of important resources because of an 
> accidental
> +          misbehavior of processes or malicious activity aiming to 
> ``kill'' +          the system. It's worth to mention that resource limits 
> configured +          by setrlimit(2) do not give an acceptable level of 
> protection +          because they cover only small fraction of resources 
> and work on a +          per-process basis.  Per-process accounting doesn't 
> prevent malicious
> +          users from spawning a lot of resource-consuming processes.

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