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

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Message-ID: <2c0942db0802200854t64e9ac73g41f0031f4cd995d4@mail.gmail.com>
Date:	Wed, 20 Feb 2008 08:54:59 -0800
From:	"Ray Lee" <ray-lk@...rabbit.org>
To:	balbir@...ux.vnet.ibm.com
Cc:	"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

On Wed, Feb 20, 2008 at 7:20 AM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> John Stoffel wrote:
>  > 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. If you look through some of the references
>  in the document, we've listed our plans to support other categories of memory as
>  well. Hence it's called a memory controller

While logical, the term is too generic. Memory [Allocation] Governor
might be closer. Memory Quota Controller actually matches the already
established terminology (quotas).

Regardless, Andi's point remains: At minimum, the kconfig text needs
to be clear for distributors and end-users as to why they'd want to
enable this, or what reasons would cause them to not enable it.
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