From: Benjamin LaHaise <bcrl@redhat.com>
To: Alex Bligh - linux-kernel <linux-kernel@alex.org.uk>
Cc: mingo@elte.hu, jamal <hadi@cyberus.ca>,
linux-kernel@vger.kernel.org,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Robert Olsson <Robert.Olsson@data.slu.se>,
netdev@oss.sgi.com, Linus Torvalds <torvalds@transmeta.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Simon Kirby <sim@netnation.com>
Subject: Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5
Date: Thu, 4 Oct 2001 19:26:45 -0400 [thread overview]
Message-ID: <20011004192645.A20389@redhat.com> (raw)
In-Reply-To: <20011004174945.B18528@redhat.com> <309455016.1002241234@[195.224.237.69]>
In-Reply-To: <309455016.1002241234@[195.224.237.69]>; from linux-kernel@alex.org.uk on Fri, Oct 05, 2001 at 12:20:34AM +0100
On Fri, Oct 05, 2001 at 12:20:34AM +0100, Alex Bligh - linux-kernel wrote:
> Rather than bugging the author of the driver card, we've actually
> been trying to fix it, down to rewriting the firmware. So for
> this purpose I/we am/are the driver maintainer thanks. However,
> there are limitations like bus speed which mean that in practice
> if we receive a large enough number of small packets each second,
> the box will saturate.
Not if the driver has a decent irq mitigation schema and uses the
hw flow control + NAPI bits.
> Not sure this required jumping down my throat.
Frankly I'm sick of this entire discussion where people claim that no
form of interrupt throttling is ever needed. It's an emergency measure
that is needed under some circumstances as very few drivers properly
protect against this kind of DoS. Drivers that do things correctly will
never trigger the hammer. Plus it's configurable. If you'd bothered to
read and understand the rest of this thread you wouldn't have posted.
-ben
next prev parent reply other threads:[~2001-10-04 23:26 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
2001-10-02 17:03 ` Robert Olsson
2001-10-02 17:37 ` jamal
2001-10-02 19:46 ` Andreas Dilger
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 [this message]
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 13:38 ` Robert Olsson
2001-10-04 21:22 ` Alex Bligh - linux-kernel
2001-10-05 14:32 ` Robert Olsson
2001-10-03 15:28 ` Ingo Molnar
2001-10-03 15:56 ` jamal
2001-10-03 16:51 ` Ingo Molnar
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
2001-10-07 6:11 ` Robert Olsson
2001-10-08 13:58 ` jamal
2001-10-08 17:42 ` Robert Olsson
2001-10-08 17:39 ` jamal
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
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 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
2001-10-04 13:05 ` Robert Olsson
2001-10-05 16:42 ` kuznet
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 8:38 ` Ingo Molnar
2001-10-04 3:50 ` bill davidsen
-- 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=20011004192645.A20389@redhat.com \
--to=bcrl@redhat.com \
--cc=Robert.Olsson@data.slu.se \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=hadi@cyberus.ca \
--cc=kuznet@ms2.inr.ac.ru \
--cc=linux-kernel@alex.org.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=netdev@oss.sgi.com \
--cc=sim@netnation.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