linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Pavel Machek <pavel@ucw.cz>
Cc: Davide Libenzi <davidel@xmailserver.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [patch] SCHED_SOFTRR linux scheduler policy ...
Date: 13 Jul 2003 12:53:31 +0100	[thread overview]
Message-ID: <1058097211.32496.30.camel@dhcp22.swansea.linux.org.uk> (raw)
In-Reply-To: <20030713115033.GA371@elf.ucw.cz>

On Sul, 2003-07-13 at 12:50, Pavel Machek wrote:
> Hi!
> 
> > I finally found a couple of hours for this and I also found a machine were
> > I can run 2.5, since luck abandoned myself about this. The small page
> > describe the obvious and contain the trivial patch and the latecy test app :
> > 
> > http://www.xmailserver.org/linux-patches/softrr.html
> 
> What happens if evil user forks 60 processes, marks them all
> SCHED_SOFTRR, and tries to starve everyone else?

With the current scheduler you lose. Rik did some playing with a fair
share scheduler some time ago. That actually works very well for a lot
of these sorts of things. You can nice processes up (but only by
penalising your own processes) and conceptually you'd be able to soft
real time on a per user basis this way. 

Alan


  reply	other threads:[~2003-07-13 11:41 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-10  2:33 [patch] SCHED_SOFTRR linux scheduler policy Davide Libenzi
2003-07-13 11:50 ` Pavel Machek
2003-07-13 11:53   ` Alan Cox [this message]
2003-07-13 18:13     ` Scheduler woes ( was [patch] SCHED_SOFTRR linux scheduler policy) Davide Libenzi
2003-07-13 16:08   ` [patch] SCHED_SOFTRR linux scheduler policy Davide Libenzi
2003-07-12 13:43 Miguel Freitas
2003-07-12 15:20 ` Davide Libenzi
2003-07-12 15:49   ` Jamie Lokier
2003-07-12 15:59     ` Davide Libenzi
2003-07-12 16:20       ` Jamie Lokier
2003-07-12 16:18         ` Davide Libenzi
2003-07-12 16:41         ` Miguel Freitas
2003-07-12 18:51           ` Jamie Lokier
2003-07-13  1:44             ` Davide Libenzi
2003-07-13 14:11               ` Jamie Lokier
2003-07-13 17:15                 ` Davide Libenzi
2003-07-12 22:42       ` Bill Huey
2003-07-13  2:39         ` Davide Libenzi
2003-07-13  3:59           ` Bill Huey
2003-07-12 16:34   ` Miguel Freitas
2003-07-12 16:30     ` Davide Libenzi
2003-07-12 19:13       ` Miguel Freitas
2003-07-12 20:07         ` Davide Libenzi
2003-07-12 18:44     ` Jamie Lokier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1058097211.32496.30.camel@dhcp22.swansea.linux.org.uk \
    --to=alan@lxorguk.ukuu.org.uk \
    --cc=davidel@xmailserver.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pavel@ucw.cz \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).