linux-kernel - Re: [PATCH v4] sched: automated per session task groups

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 4 Dec 2010 16:31:42 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Colin Walters <walters@...bum.org>
Cc:	Mike Galbraith <efault@....de>, Ingo Molnar <mingo@...e.hu>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] sched: automated per session task groups

On Sat, Dec 4, 2010 at 3:43 PM, Colin Walters <walters@...bum.org> wrote:
> On Sat, Dec 4, 2010 at 5:39 PM, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
>
>> And it doesn't hurt you. If you're happy with "nice", go on and use
>> it. Why are you even discussing it?
>
> Because it seems to me like a bug if it isn't as good as group
> scheduling?  Most of your message is saying it's worthless, and I
> don't disagree that it's not very good *right now*.  I guess where we
> disagree is whether it's worth fixing.

It's not worth 'fixing", because it works exactly like it's designed -
and supposed - to work.

There really isn't anything to fix. 'nice' is what it is. It's a
simple legacy interface to scheduler priority. The fact that it's also
almost totally useless is irrelevant. It's like male nipples. We
wouldn't be better off lactating, and they look like some odd wart
that doesn't do much good. But it would be worse to remove it.

'nice' is a bad idea. It's a bad idea that has perfectly
understandable historical reasons for it, but it's an _unfixably_ bad
idea.

                      Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/