From: Andi Kleen <ak@muc.de>
To: Adrian Bunk <bunk@fs.tum.de>
Cc: linux-kernel@vger.kernel.org, Dave Jones <davej@redhat.com>,
linux-kernel@vger.kernel.org, alan@lxorguk.ukuu.org.uk
Subject: Re: RFC: [2.6 patch] better i386 CPU selection
Date: Sun, 14 Sep 2003 02:07:04 +0200 [thread overview]
Message-ID: <m3y8ws6xnb.fsf@averell.firstfloor.org> (raw)
In-Reply-To: <vqKS.2NP.29@gated-at.bofh.it> (Adrian Bunk's message of "Sun, 14 Sep 2003 00:10:19 +0200")
Adrian Bunk <bunk@fs.tum.de> writes:
>
> I don't like the current user interface that says "if you want to
> support both an Athlon and a Pentium 4 in your kernel use the Pentium III
> option. And for better optimization, also check the "generic" option".
The big issue with your ifdefing of workarounds is that it causes subtle
support problems. A lot of settings for specific CPUs boot and work
fine on other CPUs (possibly with small performance impact, but they're
rarely noticeable without explicit benchmarking). Just when you don't
include the workarounds for the bugs on these other CPUs it will boot and
even run, but fail mysteriously once a month. And that would be a support
nightmare.
-Andi
next parent reply other threads:[~2003-09-14 0:08 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <viay.6qh.11@gated-at.bofh.it>
[not found] ` <vli4.2Ml.15@gated-at.bofh.it>
[not found] ` <vnjR.5Sn.5@gated-at.bofh.it>
[not found] ` <vnD7.6jK.1@gated-at.bofh.it>
[not found] ` <vnMX.6x0.17@gated-at.bofh.it>
[not found] ` <vqKS.2NP.29@gated-at.bofh.it>
2003-09-14 0:07 ` Andi Kleen [this message]
2003-09-14 0:10 ` RFC: [2.6 patch] better i386 CPU selection David Lang
2003-09-14 8:55 John Bradford
-- strict thread matches above, loose matches on Subject: below --
2003-09-14 8:52 John Bradford
2003-09-13 12:51 Adrian Bunk
2003-09-13 14:20 ` Kevin P. Fleming
2003-09-13 17:10 ` Adrian Bunk
2003-09-13 16:11 ` Dave Jones
2003-09-13 16:41 ` Adrian Bunk
2003-09-13 17:21 ` Dave Jones
2003-09-13 18:22 ` Adrian Bunk
2003-09-13 18:35 ` Dave Jones
2003-09-13 21:52 ` Adrian Bunk
2003-09-13 18:21 ` Jeff Garzik
2003-09-13 18:37 ` Dave Jones
2003-09-13 18:53 ` Jeff Garzik
2003-09-13 20:32 ` Alan Cox
2003-09-13 22:07 ` Adrian Bunk
2003-09-13 22:33 ` Jeff Garzik
2003-09-13 18:47 ` Alan Cox
2003-09-13 11:04 Mikael Pettersson
2003-09-13 11:02 Mikael Pettersson
2003-09-13 11:13 ` Adrian Bunk
2003-09-12 21:38 Mikael Pettersson
2003-09-12 23:23 ` Adrian Bunk
2003-09-16 12:42 ` Maciej W. Rozycki
2003-09-12 20:09 Mikael Pettersson
2003-09-12 22:51 ` Adrian Bunk
2003-09-07 21:47 Mikael Pettersson
2003-09-07 21:46 Mikael Pettersson
2003-09-07 21:56 ` Adrian Bunk
2003-09-07 16:47 Mikael Pettersson
2003-09-07 17:43 ` Jamie Lokier
2003-09-07 18:09 ` Alan Cox
2003-09-08 8:17 ` Rogier Wolff
2003-09-08 12:36 ` Alan Cox
2003-09-10 14:17 ` Pavel Machek
2003-09-11 6:28 ` Adrian Bunk
2003-09-11 11:04 ` Dave Jones
2003-09-12 20:41 ` Adrian Bunk
2003-09-11 12:10 ` Maciej W. Rozycki
2003-09-12 19:07 ` Adrian Bunk
2003-09-16 12:34 ` Maciej W. Rozycki
2003-09-11 14:25 ` Alan Cox
2003-09-13 10:37 ` Adrian Bunk
2003-09-07 17:51 ` Adrian Bunk
2003-09-07 11:28 Adrian Bunk
2003-09-07 11:46 ` Jan-Benedict Glaw
2003-09-07 13:17 ` Adrian Bunk
2003-09-07 13:48 ` Jan-Benedict Glaw
2003-09-07 12:42 ` Sam Ravnborg
2003-09-07 12:51 ` Adrian Bunk
2003-09-07 12:42 ` Robert Schwebel
2003-09-07 13:00 ` Adrian Bunk
2003-09-07 13:14 ` Robert Schwebel
2003-09-08 15:26 ` Tom Rini
2003-09-07 17:31 ` Alan Cox
2003-09-07 17:48 ` Robert Schwebel
2003-09-07 18:04 ` Alan Cox
2003-09-07 18:26 ` Robert Schwebel
2003-09-07 19:17 ` Alan Cox
2003-09-07 19:17 ` Alan Cox
2003-09-07 17:25 ` Alan Cox
2003-09-11 6:19 ` Adrian Bunk
2003-09-08 0:46 ` Rusty Russell
2003-09-08 14:29 ` Adrian Bunk
2003-09-09 1:11 ` Rusty Russell
2003-09-11 6:22 ` Adrian Bunk
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