From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: hadi@cyberus.ca (jamal)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox),
jgarzik@mandrakesoft.com (Jeff Garzik),
andrea@suse.de (Andrea Arcangeli), mingo@elte.hu (Ingo Molnar),
linux-kernel@vger.kernel.org (Linux-Kernel),
netdev@oss.sgi.com, torvalds@transmeta.com (Linus Torvalds)
Subject: Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5
Date: Mon, 8 Oct 2001 16:35:24 +0100 (BST) [thread overview]
Message-ID: <E15qcRA-0000uJ-00@the-village.bc.nu> (raw)
In-Reply-To: <Pine.GSO.4.30.0110081117140.5473-100000@shell.cyberus.ca> from "jamal" at Oct 08, 2001 11:20:32 AM
> I hear you, but I think isolation is important;
> If i am telneted (literal example here) onto that machine (note eth0 is
> not cardbus based) and cardbus is causing the loops then iam screwed.
> [The same applies to everything that shares interupts]
Worst case it sucks, but it isnt dead.
Once you disable the IRQ and kick over to polling the cardbus and the
ethernet both still get regular service. Ok so your pps rate and your
latency are unpleasant, but you are not dead.
For a shared IRQ we know we can safely switch to a 200Hz poll of shared
irq lines marked 'stuck'. The problem ones are non shared ISA devices going
mad - there you have to be careful not to fake more irqs than real ones
are delivered since some ISA device drivers "know" the IRQ is for them.
Even at 200Hz polling a typical cardbus card with say 32 ring buffer slots
can process 6000pps.
Alan
next prev parent reply other threads:[~2001-10-08 15:29 UTC|newest]
Thread overview: 151+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-02 0:41 [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5 jamal
2001-10-02 1:04 ` Benjamin LaHaise
2001-10-02 1:54 ` jamal
2001-10-02 5:13 ` Benjamin LaHaise
2001-10-02 5:55 ` Ben Greear
2001-10-03 9:22 ` Ingo Molnar
2001-10-03 14:06 ` David Brownell
2001-10-02 12:10 ` jamal
2001-10-02 22:00 ` jamal
2001-10-03 8:34 ` Ingo Molnar
2001-10-03 9:29 ` Helge Hafting
2001-10-03 12:49 ` jamal
2001-10-03 14:51 ` Ingo Molnar
2001-10-03 15:14 ` jamal
2001-10-03 17:28 ` Ingo Molnar
2001-10-04 0:53 ` jamal
2001-10-04 6:28 ` Ingo Molnar
2001-10-04 11:34 ` jamal
2001-10-04 17:40 ` Andreas Dilger
2001-10-04 18:33 ` jamal
2001-10-04 6:50 ` Ben Greear
2001-10-04 6:52 ` Ingo Molnar
2001-10-04 11:50 ` jamal
2001-10-04 6:55 ` Jeff Garzik
2001-10-04 6:56 ` Ingo Molnar
2001-10-04 21:28 ` Alex Bligh - linux-kernel
2001-10-04 21:49 ` Benjamin LaHaise
2001-10-04 23:20 ` Alex Bligh - linux-kernel
2001-10-04 23:26 ` Benjamin LaHaise
2001-10-04 23:47 ` Robert Love
2001-10-04 23:51 ` Linus Torvalds
2001-10-05 0:00 ` Ben Greear
2001-10-05 0:18 ` Davide Libenzi
2001-10-05 2:01 ` jamal
2001-10-04 22:01 ` Simon Kirby
2001-10-04 23:25 ` Alex Bligh - linux-kernel
2001-10-04 23:34 ` Simon Kirby
2001-10-04 22:10 ` Alan Cox
2001-10-04 23:28 ` Alex Bligh - linux-kernel
2001-10-05 15:22 ` Robert Olsson
2001-10-03 9:38 ` Ingo Molnar
2001-10-03 13:03 ` jamal
2001-10-03 13:25 ` jamal
2001-10-03 15:28 ` Ingo Molnar
2001-10-03 15:56 ` jamal
2001-10-03 16:51 ` Ingo Molnar
2001-10-04 0:46 ` jamal
2001-10-08 0:31 ` Andrea Arcangeli
2001-10-08 4:58 ` Bernd Eckenfels
2001-10-08 15:00 ` Alan Cox
2001-10-08 15:03 ` Jeff Garzik
2001-10-08 15:12 ` Alan Cox
2001-10-08 15:09 ` jamal
2001-10-08 15:22 ` Alan Cox
2001-10-08 15:20 ` jamal
2001-10-08 15:35 ` Alan Cox [this message]
2001-10-08 15:57 ` jamal
2001-10-08 16:11 ` Alan Cox
2001-10-08 16:11 ` jamal
2001-10-10 16:26 ` Pavel Machek
2001-10-10 16:25 ` Pavel Machek
2001-10-08 15:24 ` Andrea Arcangeli
2001-10-08 15:35 ` Alan Cox
2001-10-08 15:19 ` Andrea Arcangeli
2001-10-08 15:10 ` bill davidsen
2001-10-03 21:08 ` Robert Olsson
2001-10-03 22:22 ` Andreas Dilger
2001-10-04 17:32 ` Davide Libenzi
2001-10-05 14:52 ` Robert Olsson
2001-10-05 18:48 ` Andreas Dilger
2001-10-05 19:07 ` Davide Libenzi
2001-10-05 19:17 ` kuznet
2001-10-08 13:58 ` jamal
2001-10-08 17:42 ` Robert Olsson
2001-10-08 17:39 ` jamal
2001-10-07 6:11 ` Robert Olsson
2001-10-03 16:53 ` kuznet
2001-10-03 17:06 ` Ingo Molnar
2001-10-04 0:44 ` jamal
2001-10-04 6:35 ` Ingo Molnar
2001-10-04 11:41 ` jamal
2001-10-05 16:42 ` kuznet
2001-10-04 13:05 ` Robert Olsson
2001-10-03 19:03 ` Benjamin LaHaise
2001-10-04 1:10 ` jamal
2001-10-04 1:30 ` Benjamin LaHaise
2001-10-03 22:31 ` Rob Landley
2001-10-04 1:39 ` jamal
2001-10-03 15:42 ` Ben Greear
2001-10-03 15:58 ` jamal
2001-10-03 16:09 ` Ben Greear
2001-10-03 16:14 ` Ingo Molnar
2001-10-03 16:20 ` Jeff Garzik
2001-10-03 16:33 ` Linus Torvalds
2001-10-03 17:25 ` Ingo Molnar
2001-10-03 18:11 ` Linus Torvalds
2001-10-03 20:41 ` Jeremy Hansen
2001-10-03 20:02 ` Simon Kirby
2001-10-04 1:04 ` jamal
2001-10-04 6:47 ` Ben Greear
2001-10-04 7:41 ` Henning P. Schmiedehausen
2001-10-04 16:09 ` Ben Greear
2001-10-04 17:32 ` Henning P. Schmiedehausen
2001-10-04 18:03 ` Ben Greear
2001-10-04 18:30 ` Christopher E. Brown
2001-10-04 11:47 ` jamal
2001-10-04 15:56 ` Ben Greear
2001-10-04 18:23 ` jamal
2001-10-04 6:50 ` Ingo Molnar
2001-10-04 11:49 ` jamal
2001-10-04 8:45 ` Simon Kirby
2001-10-04 11:54 ` jamal
2001-10-04 15:03 ` Tim Hockin
2001-10-04 18:55 ` Ion Badulescu
2001-10-04 19:00 ` jamal
2001-10-04 21:16 ` Ion Badulescu
2001-10-04 4:12 ` bill davidsen
2001-10-04 18:16 ` Alan Cox
2001-10-03 13:38 ` Robert Olsson
2001-10-04 21:22 ` Alex Bligh - linux-kernel
2001-10-05 14:32 ` Robert Olsson
2001-10-03 8:38 ` Ingo Molnar
2001-10-04 3:50 ` bill davidsen
2001-10-02 17:03 ` Robert Olsson
2001-10-02 17:37 ` jamal
2001-10-02 19:46 ` Andreas Dilger
-- strict thread matches above, loose matches on Subject: below --
2001-10-08 14:45 jamal
2001-10-09 0:36 ` Scott Laird
2001-10-09 3:17 ` jamal
2001-10-09 4:04 ` Werner Almesberger
2001-10-04 8:25 Magnus Redin
2001-10-04 11:39 ` Trever L. Adams
[not found] <200110031811.f93IBoN10026@penguin.transmeta.com>
2001-10-03 18:23 ` Ingo Molnar
2001-10-04 9:19 ` BALBIR SINGH
2001-10-04 9:22 ` Ingo Molnar
2001-10-04 9:49 ` BALBIR SINGH
2001-10-04 10:25 ` Ingo Molnar
2001-10-07 20:37 ` Andrea Arcangeli
2001-10-03 14:15 Manfred Spraul
2001-10-03 15:09 ` jamal
2001-10-03 18:37 ` Davide Libenzi
2001-10-01 22:16 Ingo Molnar
2001-10-01 22:26 ` Tim Hockin
2001-10-01 22:50 ` Ingo Molnar
2001-10-01 22:36 ` Andreas Dilger
2001-10-01 22:50 ` Ben Greear
2001-10-02 14:30 ` Alan Cox
2001-10-02 20:51 ` Ingo Molnar
2001-10-01 23:03 ` Linus Torvalds
2001-10-02 6:50 ` Marcus Sundberg
2001-10-03 8:47 ` Ingo Molnar
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=E15qcRA-0000uJ-00@the-village.bc.nu \
--to=alan@lxorguk.ukuu.org.uk \
--cc=andrea@suse.de \
--cc=hadi@cyberus.ca \
--cc=jgarzik@mandrakesoft.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=netdev@oss.sgi.com \
--cc=torvalds@transmeta.com \
/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).