From: "David S. Miller" <davem@redhat.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Arjan van de Ven <arjanv@redhat.com>,
Badari Pulavarty <pbadari@us.ibm.com>,
lkml <linux-kernel@vger.kernel.org>,
Gerrit Huizenga <gh@us.ibm.com>,
John Stultz <johnstul@us.ibm.com>,
James Cleverdon <jamesclv@us.ibm.com>,
Andrew Morton <akpm@digeo.com>,
Keith Mannthey <mannthey@us.ibm.com>
Subject: Re: userspace irq balancer
Date: 19 May 2003 20:25:31 -0700 [thread overview]
Message-ID: <1053401130.6830.3.camel@rth.ninka.net> (raw)
In-Reply-To: <1053382943.4827.358.camel@nighthawk>
On Mon, 2003-05-19 at 15:22, Dave Hansen wrote:
> > as for distros: RHL8 and later ship with it on the RH side
> > (default enabled as of RHL9).
>
> But, do you see the need for ripping out the current code? For those of
> us that are still running a slightly more primitive distro, it would be
> nice to have some pretty effective default behavior, like what is in the
> kernel now.
You have to install new modutils to even use modules with the 2.5.x
kernel, given that why are we even talking about the "inconvenience"
of installing the usermode IRQ balancer as being a blocker for
ripping out the in-kernel stuff?
The in-kernel stuff MUST go. It went in because "some benchmark went
faster", but with no "why" describing why it might have improved
performance. We KNOW it absolutely sucks for routing and firewall
applications. The in-kernel bits were all a shamans dance, with zero
technical "here is why this makes things go faster" description
attached. If I remember properly, the changelog message when the
in-kernel irq balancing went in was of the form "this makes some
specweb run go faster".
--
David S. Miller <davem@redhat.com>
next prev parent reply other threads:[~2003-05-20 3:12 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200305191314.06216.pbadari@us.ibm.com>
2003-05-19 22:07 ` userspace irq balancer Dave Hansen
2003-05-19 22:11 ` Arjan van de Ven
2003-05-19 22:22 ` Dave Hansen
2003-05-20 3:25 ` David S. Miller [this message]
2003-05-20 3:46 ` William Lee Irwin III
2003-05-20 5:03 ` Dave Hansen
2003-05-20 5:53 ` Martin J. Bligh
2003-05-20 6:13 ` David S. Miller
2003-05-20 6:36 ` Dave Hansen
2003-05-20 6:40 ` David S. Miller
2003-05-20 14:07 ` Andrew Theurer
2003-05-20 14:21 ` Jeff Garzik
2003-05-20 14:35 ` Andrew Theurer
[not found] ` <20030520.163833.104040023.davem@redhat.com>
2003-05-21 14:58 ` Martin J. Bligh
2003-05-21 22:55 ` David S. Miller
2003-05-21 11:00 ` Kai Bankett
2003-05-20 14:01 ` Martin J. Bligh
2003-05-20 9:00 ` Arjan van de Ven
2003-05-20 9:14 ` William Lee Irwin III
2003-05-20 9:17 ` Andrew Morton
[not found] ` <20030520.172230.102567463.davem@redhat.com>
2003-05-21 14:27 ` James Cleverdon
2003-05-20 15:41 Nakajima, Jun
2003-05-21 13:54 ` James Cleverdon
2003-05-21 22:56 ` Zwane Mwaikambo
-- strict thread matches above, loose matches on Subject: below --
2003-05-21 16:31 James Bottomley
2003-05-21 20:16 ` Arjan van de Ven
2003-05-21 21:43 Nakajima, Jun
2003-05-22 0:29 ` Gerrit Huizenga
2003-05-22 1:28 ` Martin J. Bligh
2003-05-22 1:44 ` Gerrit Huizenga
2003-05-22 2:03 ` William Lee Irwin III
2003-05-22 2:04 ` William Lee Irwin III
2003-05-22 2:12 ` Zwane Mwaikambo
2003-05-22 3:57 ` Martin J. Bligh
2003-05-22 17:24 ` Bill Davidsen
2003-05-22 22:44 ` David S. Miller
2003-05-26 22:24 ` Andrea Arcangeli
2003-05-26 23:26 ` Andrew Morton
2003-05-26 23:34 ` Andrea Arcangeli
2003-05-26 23:43 ` David S. Miller
[not found] ` <20030527000639.GA3767@dualathlon.random>
2003-05-27 0:15 ` David S. Miller
2003-05-27 0:41 ` Andrea Arcangeli
2003-05-27 0:48 ` David S. Miller
2003-05-27 1:09 ` Andrea Arcangeli
2003-05-27 1:13 ` David S. Miller
2003-05-27 1:26 ` Andrea Arcangeli
2003-05-27 6:11 ` David S. Miller
2003-05-27 11:53 ` Andrea Arcangeli
2003-05-27 22:04 ` David S. Miller
2003-05-27 22:27 ` Andrea Arcangeli
2003-05-27 23:55 ` David S. Miller
2003-06-13 6:22 ` David S. Miller
2003-06-13 18:23 ` Andrea Arcangeli
2003-05-27 1:16 ` Dave Jones
2003-05-27 1:17 ` David S. Miller
2003-05-27 9:07 ` Arjan van de Ven
2003-05-27 9:10 ` David S. Miller
2003-05-27 1:28 ` Andrea Arcangeli
2003-05-27 1:53 ` William Lee Irwin III
2003-05-27 1:59 ` Andrew Morton
2003-05-27 2:10 ` William Lee Irwin III
2003-05-27 2:15 ` Zwane Mwaikambo
2003-05-27 2:44 ` William Lee Irwin III
2003-05-27 2:45 ` Zwane Mwaikambo
2003-05-27 4:22 ` William Lee Irwin III
2003-05-27 2:15 ` Andrea Arcangeli
2003-05-27 2:14 ` Andrea Arcangeli
2003-05-27 2:26 ` William Lee Irwin III
2003-05-27 1:17 ` Andrea Arcangeli
2003-05-27 1:20 ` David S. Miller
2003-05-27 1:33 ` Andrea Arcangeli
2003-05-22 14:18 ` James Cleverdon
2003-05-22 14:43 ` William Lee Irwin III
2003-05-22 15:30 ` James Cleverdon
2003-05-22 15:45 ` William Lee Irwin III
2003-05-24 1:10 Nakajima, Jun
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