linux-kernel - Re: is RSDL an "unfair" scheduler too?

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Message-ID: <Pine.LNX.4.64.0703171830130.4964@woody.linux-foundation.org>
Date:	Sat, 17 Mar 2007 18:32:29 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	William Lee Irwin III <wli@...omorphy.com>
cc:	Avi Kivity <avi@...o.co.il>, Ingo Molnar <mingo@...e.hu>,
	Con Kolivas <kernel@...ivas.org>, ck@....kolivas.org,
	Serge Belyshev <belyshev@...ni.sinp.msu.ru>,
	Al Boldi <a1426z@...ab.com>, Mike Galbraith <efault@....de>,
	linux-kernel@...r.kernel.org, Nicholas Miell <nmiell@...cast.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: is RSDL an "unfair" scheduler too?

On Sat, 17 Mar 2007, William Lee Irwin III wrote:
> 
> One issue this raises is prioritizing users on a system, threads within
> processes, jobs within users, etc.

Doing some "classing" even by just euid might be a good idea. It would 
actually catch X automatically most of the time, because the euid of the X 
server is likely to be root, so even for the "trivial" desktop example, it 
would kind of automatically mean that X would get about 50% of CPU time 
even if you have a hundred user clients, just because that's "fair" by 
euid.

Dunno. I guess a lot of people would like to then manage the classes, 
which would be painful as hell. 

		Linus
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