From: Andi Kleen <ak@suse.de>
To: ebiederm@xmission.com (Eric W. Biederman)
Cc: jgarzik@pobox.com, akpm@osdl.org, richard.brunner@amd.com,
linux-kernel@vger.kernel.org, torvalds@osdl.org
Subject: Re: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata
Date: Fri, 12 Sep 2003 19:56:06 +0200 [thread overview]
Message-ID: <20030912195606.24e73086.ak@suse.de> (raw)
In-Reply-To: <m1vfrxlxol.fsf@ebiederm.dsl.xmission.com>
On 12 Sep 2003 11:32:42 -0600
ebiederm@xmission.com (Eric W. Biederman) wrote:
> There may be better places to attack. But new code is what is up for
> examination and is easiest to fix.
With is_prefetch:
text data bss dec hex filename
2782 4 0 2786 ae2 arch/i386/mm/fault.o
Without is_prefetch:
text data bss dec hex filename
2446 4 0 2450 992 arch/i386/mm/fault.o
Difference 332 bytes
If you start your attack on 332 bytes then IMHO you have your priorities wrong ;-)
The main reason I'm really against this is that currently the P4 kernels work
fine on Athlon. Just when is_prefetch is not integrated in them there will
be an mysterious oops once every three months in the kernel in prefetch
on Athlon.
That would be bad. The alternative would be to prevent the P4 kernel
from booting on the Athlon at all, but doing that for 332 bytes
would seem a bit silly.
-Andi
P.S.: If you really want to shrink 2.6 I would start with making sysfs optional.
That would likely help much more than micro optimizing non bloated parts.
next prev parent reply other threads:[~2003-09-12 17:56 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-11 0:56 Update on AMD Athlon/Opteron/Athlon64 Prefetch Errata richard.brunner
2003-09-11 1:27 ` [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata Andi Kleen
2003-09-11 1:44 ` Andrew Morton
2003-09-11 1:47 ` Andi Kleen
2003-09-11 14:15 ` Jeff Garzik
2003-09-11 14:26 ` Andi Kleen
2003-09-11 14:34 ` Jeff Garzik
2003-09-11 14:58 ` Andi Kleen
2003-09-11 15:06 ` Jeff Garzik
2003-09-11 20:08 ` bill davidsen
2003-09-11 19:56 ` bill davidsen
2003-09-11 20:44 ` Alan Cox
2003-09-11 21:29 ` Mike Fedyk
2003-09-11 21:38 ` bill davidsen
2003-09-12 17:32 ` Eric W. Biederman
2003-09-12 17:56 ` Andi Kleen [this message]
2003-09-12 17:59 ` Jeff Garzik
2003-09-12 18:22 ` Adrian Bunk
2003-09-12 18:28 ` Andi Kleen
2003-09-12 18:39 ` Jeff Garzik
2003-09-12 18:45 ` Jeff Garzik
2003-09-12 18:48 ` Adrian Bunk
2003-09-12 19:07 ` Andi Kleen
2003-09-12 19:05 ` Martin Schlemmer
2003-09-12 19:30 ` Andi Kleen
2003-09-12 19:58 ` Martin Schlemmer
2003-09-12 20:00 ` Adrian Bunk
2003-09-15 0:15 ` bill davidsen
2003-09-14 23:51 ` bill davidsen
2003-09-14 23:49 ` bill davidsen
2003-09-14 23:47 ` bill davidsen
2003-09-15 1:02 ` Zwane Mwaikambo
2003-09-15 2:08 ` Nick Piggin
2003-09-15 3:55 ` Bill Davidsen
2003-09-15 7:45 ` Alan Cox
2003-09-15 12:11 ` Bill Davidsen
2003-09-15 13:48 ` Alan Cox
2003-09-15 18:50 ` Bill Davidsen
2003-09-12 18:03 ` Mike Fedyk
2003-09-11 13:54 ` Linus Torvalds
2003-09-11 14:01 ` Andi Kleen
2003-09-11 14:14 ` Dave Jones
2003-09-11 14:29 ` Andi Kleen
2003-09-11 14:14 ` Alan Cox
2003-09-11 14:24 ` Andi Kleen
2003-09-11 14:28 ` Dave Jones
2003-09-11 14:32 ` Andi Kleen
2003-09-11 20:14 ` bill davidsen
2003-09-11 16:58 ` Jamie Lokier
2003-09-11 17:05 ` Andi Kleen
2003-09-11 17:32 ` Jamie Lokier
2003-09-11 17:39 ` Andi Kleen
2003-09-11 17:48 ` Jamie Lokier
2003-09-11 18:18 ` Andi Kleen
2003-09-11 18:59 ` Jamie Lokier
2003-09-11 3:43 Nakajima, Jun
2003-09-11 4:03 ` Valdis.Kletnieks
[not found] <uqD5.3BI.3@gated-at.bofh.it>
2003-09-11 4:14 ` Andi Kleen
2003-09-11 4:58 ` dada1
2003-09-11 5:11 ` Andi Kleen
2003-09-11 5:58 ` dada1
2003-09-11 4:55 richard.brunner
2003-09-11 16:55 ` Jamie Lokier
2003-09-12 14:14 ` Martin Schlemmer
2003-09-11 17:09 richard.brunner
2003-09-11 17:14 richard.brunner
2003-09-11 17:17 richard.brunner
2003-09-13 16:54 ` Pavel Machek
2003-09-12 21:24 John Bradford
2003-09-15 6:32 John Bradford
2003-09-15 7:40 ` Alan Cox
2003-09-15 12:02 ` Bill Davidsen
2003-09-15 11:48 ` Bill Davidsen
2003-09-15 20:55 ` Adrian Bunk
2003-09-16 0:26 ` Bill Davidsen
2003-09-15 8:31 John Bradford
2003-09-15 8:32 ` Nick Piggin
2003-09-15 20:51 ` Adrian Bunk
2003-09-15 9:39 John Bradford
2003-09-15 9:58 ` Nick Piggin
2003-09-15 10:54 John Bradford
2003-09-15 10:52 ` Nick Piggin
2003-09-15 13:45 ` Alan Cox
2003-09-15 18:44 ` Bill Davidsen
2003-09-15 11:46 John Bradford
2003-09-15 12:38 ` Nick Piggin
2003-09-15 13:46 ` Chris Meadors
2003-09-15 14:00 ` Nick Piggin
2003-09-16 15:06 ` Bill Davidsen
2003-09-16 15:24 ` Nick Piggin
2003-09-15 12:28 Mikael Pettersson
2003-09-15 18:13 ` Bill Davidsen
2003-09-16 11:54 ` Jamie Lokier
2003-09-15 12:43 John Bradford
2003-09-15 18:21 ` Bill Davidsen
2003-09-15 14:21 John Bradford
2003-09-15 16:21 richard.brunner
2003-09-15 19:15 ` Bill Davidsen
2003-09-16 11:46 ` Jamie Lokier
2003-09-16 13:30 ` Dave Jones
2003-09-16 13:52 ` Bill Davidsen
2003-09-16 15:25 ` Timothy Miller
2003-09-16 16:53 ` Bill Davidsen
2003-09-16 17:22 ` Jamie Lokier
2003-09-16 17:23 ` Jamie Lokier
2003-09-18 7:43 ` Pavel Machek
2003-09-18 14:05 ` Dave Jones
2003-09-18 15:56 ` Jamie Lokier
2003-09-18 17:34 ` Bill Davidsen
[not found] <200309150632.h8F6WnHb000589@81-2-122-30.bradfords.org.uk.suse.lists.linux.kernel>
[not found] ` <1063611650.2674.1.camel@dhcp23.swansea.linux.org.uk.suse.lists.linux.kernel>
2003-09-15 18:29 ` Andi Kleen
2003-09-15 19:19 John Bradford
2003-09-15 19:34 John Bradford
2003-09-15 19:25 ` Bill Davidsen
2003-09-15 22:28 ` Alan Cox
2003-09-15 19:51 richard.brunner
2003-09-16 0:01 ` David Lang
2003-09-16 0:20 ` Bill Davidsen
2003-09-16 11:50 ` Jamie Lokier
2003-09-16 13:46 ` Bill Davidsen
2003-09-16 17:21 ` Jamie Lokier
2003-09-15 20:03 Nakajima, Jun
2003-09-15 20:20 Nakajima, Jun
2003-09-16 2:23 richard.brunner
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=20030912195606.24e73086.ak@suse.de \
--to=ak@suse.de \
--cc=akpm@osdl.org \
--cc=ebiederm@xmission.com \
--cc=jgarzik@pobox.com \
--cc=linux-kernel@vger.kernel.org \
--cc=richard.brunner@amd.com \
--cc=torvalds@osdl.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).