linux-kernel - Re: [PATCH] Document huge memory/cache overhead of memory controller in Kconfig

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Message-ID: <20080220181911.GA4760@ucw.cz>
Date:	Wed, 20 Feb 2008 18:19:12 +0000
From:	Pavel Machek <pavel@....cz>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	John Stoffel <john@...ffel.org>,
	Andi Kleen <andi@...stfloor.org>, akpm@...l.org,
	torvalds@...l.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] Document huge memory/cache overhead of memory controller in Kconfig

Hi!

> >> I know this is a pedantic comment, but why the heck is it called such
> >> a generic term as "Memory Controller" which doesn't give any
> >> indication of what it does.
> >> 
> >> Shouldn't it be something like "Memory Quota Controller", or "Memory
> >> Limits Controller"?
> >
> >It's called the memory controller since it controls the amount of
> >memory that a user can allocate (via limits). The generic term for
> >any resource manager plugged into cgroups is a controller.
> 
> For ordinary desktop people, memory controller is what developers
> know as MMU or sometimes even some other mysterious piece of silicon
> inside the heavy box.

Actually I'd guess 'memory controller' == 'DRAM controller' == part of
northbridge that talks to DRAM.
							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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