From: Helge Hafting <helge.hafting@aitel.hist.no>
To: Avi Kivity <avi@argo.co.il>
Cc: davids@webmaster.com,
"Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
Subject: Re: is RSDL an "unfair" scheduler too?
Date: Mon, 19 Mar 2007 17:06:38 +0100 [thread overview]
Message-ID: <45FEB50E.2040104@aitel.hist.no> (raw)
In-Reply-To: <45FEAB60.7090704@argo.co.il>
Avi Kivity wrote:
>
> A fairly contrived example, but I see your point. Of course any
> system can be broken. I think that user-level scheduling is good for
> real multi user systems, where 'user' means a person, not an
> artificial entity. It's also good for a multi application server,
> where typically each service runs (or can be made to run) as a
> separate user.
For a not so contrived example, look at email delivery. Some mailservers do
all work as root (or some fixed email user)
Some servers will switch to the UID of the user receiving the message,
limiting the
damage in case of buffer overflow etc. A fair amount of work is then done
as that user - running the message through virus/spam-checks and
then perhaps procmail.
Helge Hafting
next prev parent reply other threads:[~2007-03-19 16:10 UTC|newest]
Thread overview: 197+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-04 20:35 [ANNOUNCE] RSDL completely fair starvation free interactive cpu scheduler Al Boldi
2007-03-04 21:49 ` Con Kolivas
[not found] ` <45EB45F7.3050208@simon.arlott.org.uk>
2007-03-04 22:27 ` Con Kolivas
2007-03-05 18:29 ` Simon Arlott
2007-03-05 21:36 ` Con Kolivas
2007-03-04 23:13 ` Willy Tarreau
2007-03-04 23:58 ` Con Kolivas
2007-03-05 0:10 ` [ck] " jos poortvliet
2007-03-05 1:09 ` Gene Heskett
[not found] ` <200703050834.45712.a1426z@gawab.com>
[not found] ` <20070305060732.GQ30401@nysv.org>
2007-03-05 11:59 ` [ck] " Al Boldi
2007-03-05 12:29 ` Con Kolivas
[not found] ` <200703052123.01095.a1426z@gawab.com>
2007-03-05 22:10 ` Con Kolivas
2007-03-06 8:42 ` Xavier Bestel
2007-03-06 15:15 ` Al Boldi
2007-03-11 18:11 ` Al Boldi
2007-03-11 21:52 ` Con Kolivas
2007-03-11 22:12 ` Con Kolivas
2007-03-12 4:42 ` Al Boldi
2007-03-12 4:53 ` Con Kolivas
2007-03-12 11:26 ` Al Boldi
2007-03-12 12:52 ` Con Kolivas
2007-03-12 14:14 ` Al Boldi
2007-03-12 14:58 ` [ck] " jos poortvliet
2007-03-12 16:37 ` michael chang
2007-03-12 17:41 ` Al Boldi
2007-03-12 18:05 ` Con Kolivas
2007-03-12 18:47 ` [ck] " jos poortvliet
2007-03-12 18:58 ` Antonio Vargas
2007-03-19 10:47 ` Helge Hafting
2007-03-18 1:30 ` Bill Davidsen
2007-03-18 10:50 ` [ck] " jos poortvliet
2007-03-13 15:31 ` [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice Con Kolivas
2007-03-13 16:03 ` [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice -1 Con Kolivas
2007-03-13 16:08 ` Con Kolivas
2007-03-13 20:58 ` Con Kolivas
2007-03-13 23:08 ` RSDL development plans Con Kolivas
2007-03-16 12:25 ` Con Kolivas
2007-03-16 13:40 ` RSDL v0.31 Con Kolivas
2007-03-16 15:34 ` Mike Galbraith
2007-03-16 21:13 ` Con Kolivas
2007-03-16 22:30 ` Mike Galbraith
2007-03-16 23:05 ` [ck] " Dirk Schoebel
2007-03-17 4:24 ` Nicholas Miell
2007-03-17 5:56 ` Mike Galbraith
2007-03-17 6:08 ` Mike Galbraith
2007-03-17 13:56 ` Ed Tomlinson
2007-03-18 19:37 ` Lee Revell
2007-03-18 19:55 ` Mike Galbraith
2007-03-18 22:45 ` Szonyi Calin
2007-03-19 2:27 ` David Schwartz
2007-03-19 6:21 ` Mike Galbraith
2007-03-19 6:59 ` Willy Tarreau
2007-03-17 6:26 ` Nicholas Miell
2007-03-17 7:11 ` Mike Galbraith
2007-03-17 7:25 ` William Lee Irwin III
2007-03-17 7:29 ` Nicholas Miell
2007-03-17 11:48 ` Gene Heskett
2007-03-17 7:45 ` Ingo Molnar
2007-03-17 7:44 ` David Lang
2007-03-17 8:46 ` Mike Galbraith
2007-03-17 14:09 ` [ck] " Mark Glines
2007-03-17 14:33 ` Mike Galbraith
2007-03-17 14:54 ` Mark Glines
2007-03-17 14:58 ` Mike Galbraith
2007-03-17 8:23 ` Nicholas Miell
2007-03-17 9:42 ` [patch] CFS scheduler: Completely Fair Scheduler / CONFIG_SCHED_FAIR Ingo Molnar
2007-03-17 8:41 ` RSDL v0.31 Serge Belyshev
2007-03-17 9:48 ` Con Kolivas
2007-03-17 9:58 ` Mike Galbraith
2007-03-17 10:49 ` Mike Galbraith
2007-03-17 12:05 ` Gene Heskett
2007-03-17 13:36 ` Mike Galbraith
2007-03-17 17:03 ` Gene Heskett
2007-03-17 17:37 ` Mike Galbraith
2007-03-17 18:23 ` [ck] " Kacper Wysocki
2007-03-17 18:45 ` Mike Galbraith
2007-03-17 13:58 ` michael chang
2007-03-17 20:55 ` Al Boldi
2007-03-18 6:17 ` Mike Galbraith
2007-03-18 6:47 ` Kasper Sandberg
2007-03-18 7:08 ` Mike Galbraith
2007-03-18 7:22 ` [ck] " Radoslaw Szkodzinski
2007-03-18 7:38 ` Mike Galbraith
2007-03-18 8:04 ` Mike Galbraith
2007-03-18 8:20 ` jimmy bahuleyan
2007-03-18 8:34 ` Mike Galbraith
2007-03-18 9:57 ` Kasper Sandberg
2007-03-18 13:57 ` Avuton Olrich
2007-03-19 20:47 ` Bill Davidsen
2007-03-20 10:19 ` jos poortvliet
2007-03-21 8:58 ` Kasper Sandberg
2007-03-18 15:44 ` Radoslaw Szkodzinski
2007-03-18 16:09 ` jos poortvliet
2007-03-19 16:07 ` Mark Lord
2007-03-19 16:26 ` Xavier Bestel
2007-03-19 16:36 ` Mark Lord
2007-03-19 16:43 ` Xavier Bestel
2007-03-20 3:11 ` Linus Torvalds
2007-03-20 6:11 ` Willy Tarreau
2007-03-20 8:03 ` Mike Galbraith
2007-03-21 14:57 ` Mike Galbraith
2007-03-21 16:02 ` Peter Zijlstra
2007-03-21 17:06 ` Mike Galbraith
2007-03-22 7:07 ` Mike Galbraith
2007-03-22 9:18 ` Ingo Molnar
2007-03-22 9:34 ` Mike Galbraith
2007-03-22 9:41 ` Mike Galbraith
2007-03-22 22:03 ` Con Kolivas
2007-03-22 22:50 ` Con Kolivas
2007-03-23 4:39 ` Mike Galbraith
2007-03-23 5:59 ` Con Kolivas
2007-03-23 6:11 ` Mike Galbraith
2007-03-23 12:17 ` Mike Galbraith
[not found] ` <20070321161147.54c7a727@localhost>
2007-03-21 17:07 ` Mike Galbraith
2007-03-22 4:49 ` Willy Tarreau
2007-03-22 7:14 ` Mike Galbraith
2007-03-20 9:03 ` Xavier Bestel
2007-03-20 12:31 ` Artur Skawina
2007-03-20 19:16 ` Artur Skawina
2007-03-21 7:50 ` Ingo Molnar
2007-03-21 10:43 ` David Schwartz
2007-03-28 23:37 ` Bill Davidsen
2007-03-29 7:10 ` David Schwartz
2007-03-29 7:34 ` Nick Piggin
2007-03-20 15:31 ` Linus Torvalds
2007-03-20 18:08 ` Al Boldi
2007-03-21 8:22 ` Keith Duthie
2007-03-28 23:43 ` Bill Davidsen
2007-03-20 10:26 ` [ck] " jos poortvliet
2007-03-20 13:22 ` Mark Lord
2007-03-20 15:16 ` Ray Lee
2007-03-20 15:20 ` Mark Lord
2007-03-21 8:55 ` Kasper Sandberg
2007-03-19 20:53 ` Al Boldi
2007-03-20 19:50 ` Artur Skawina
2007-03-21 4:15 ` Al Boldi
2007-03-21 17:24 ` Artur Skawina
2007-03-19 16:03 ` Mark Lord
2007-03-17 11:49 ` is RSDL an "unfair" scheduler too? Ingo Molnar
2007-03-17 12:02 ` Con Kolivas
2007-03-17 12:23 ` [ck] " jos poortvliet
2007-03-17 17:31 ` David Schwartz
2007-03-17 12:28 ` Ingo Molnar
2007-03-17 12:43 ` Con Kolivas
2007-03-17 16:34 ` Ingo Molnar
2007-03-18 3:23 ` Bill Davidsen
2007-03-18 2:13 ` Bill Davidsen
2007-03-18 3:20 ` Kasper Sandberg
2007-03-18 5:37 ` Mike Galbraith
2007-03-18 10:58 ` [ck] " jos poortvliet
2007-03-17 12:15 ` jos poortvliet
2007-03-17 20:41 ` Avi Kivity
2007-03-18 1:25 ` William Lee Irwin III
2007-03-18 1:32 ` Linus Torvalds
2007-03-18 5:24 ` Willy Tarreau
2007-03-18 5:55 ` Avi Kivity
2007-03-19 2:27 ` David Schwartz
2007-03-19 13:27 ` Radoslaw Szkodzinski
2007-03-19 18:30 ` David Lang
2007-03-19 15:25 ` Avi Kivity
2007-03-19 16:06 ` Helge Hafting [this message]
2007-03-19 16:37 ` Avi Kivity
2007-03-18 6:09 ` Bill Huey
2007-03-18 6:37 ` Mike Galbraith
2007-03-18 7:35 ` Bill Huey
2007-03-19 21:14 ` Bill Davidsen
2007-03-18 6:26 ` Mike Galbraith
2007-03-18 6:54 ` [ck] " Radoslaw Szkodzinski
2007-03-18 7:58 ` Willy Tarreau
2007-03-18 8:45 ` Avi Kivity
2007-03-18 5:00 ` Avi Kivity
2007-03-17 15:13 ` RSDL v0.31 Mark Hahn
2007-03-17 17:22 ` Stephen Clark
2007-03-19 15:06 ` Chris Friesen
2007-03-17 7:56 ` Ingo Molnar
2007-03-17 11:07 ` [ck] " jos poortvliet
2007-03-17 12:44 ` Ingo Molnar
2007-03-17 13:44 ` jos poortvliet
2007-03-17 14:04 ` [ck] " Ed Tomlinson
2007-03-17 14:32 ` Rik van Riel
2007-03-17 14:43 ` Mike Galbraith
2007-03-17 15:39 ` Ingo Molnar
2007-03-16 17:12 ` AshMilsted
2007-03-16 17:41 ` Gabriel C
2007-03-16 21:55 ` Al Boldi
2007-03-17 2:51 ` Con Kolivas
2007-03-17 4:40 ` Al Boldi
2007-03-17 4:57 ` Con Kolivas
2007-03-17 5:15 ` Gene Heskett
2007-03-17 13:50 ` Ed Tomlinson
2007-03-17 16:12 ` Al Boldi
2007-03-16 13:42 ` RSDL development plans Mike Galbraith
2007-03-16 13:59 ` Con Kolivas
2007-03-16 14:07 ` Mike Galbraith
2007-03-14 9:13 ` [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice Mike Galbraith
2007-03-14 9:25 ` Con Kolivas
2007-03-14 9:42 ` Mike Galbraith
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=45FEB50E.2040104@aitel.hist.no \
--to=helge.hafting@aitel.hist.no \
--cc=avi@argo.co.il \
--cc=davids@webmaster.com \
--cc=linux-kernel@vger.kernel.org \
/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).