From: V13 <v13@priest.com>
To: "Barry K. Nathan" <barryn@pobox.com>
Cc: Gene Heskett <gene.heskett@verizon.net>,
linux-kernel@vger.kernel.org,
Marc Ballarin <Ballarin.Marc@gmx.de>
Subject: Re: Possible dcache BUG
Date: Sat, 21 Aug 2004 21:31:31 +0300 [thread overview]
Message-ID: <200408212131.38019.v13@priest.com> (raw)
In-Reply-To: <20040821092556.GA14991@ip68-4-98-123.oc.oc.cox.net>
[-- Attachment #1: Type: text/plain, Size: 1272 bytes --]
On Saturday 21 August 2004 12:25, Barry K. Nathan wrote:
> > Memtest86 may not know howto enable it if its an
> > nforce2 option. Whatever cache shown as switchable in the bios,
> > turning it off makes a very sick bird out of the machine, like a
> > 33mhz 386sx?
>
> Yeah, disabling the L2 cache on a modern CPU makes it really slow. But,
> it's still a useful troubleshooting option...
When I had the problem described in my previous mail I came to the conclussion
that it was related with cache *BUT* it seemed that the cache was just
caching wrong data. Disabling the cache would just reduce the problem.
One reason for this is that when the program detected errors in a buffer (i.e.
0x1234 instead of 0x1111) then they would NOT go away if the program was
reading from this buffer all the time. This means that the cache always
returned the same data. The error was 'gone' every time the program was
suspended for a while or when something else used a lot of memory (i.e.
another instance of this program).
So, I'm not suggesting that his cache is faulty but that there can be a CPU
(or even a M/B) problem that corrupts data when they are transfered from
memory to the processor.
> -Barry K. Nathan <barryn@pobox.com>
<<V13>>
[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]
next prev parent reply other threads:[~2004-08-21 18:32 UTC|newest]
Thread overview: 147+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-02 13:14 Possible dcache BUG Brett Charbeneau
2004-08-05 2:16 ` Gene Heskett
2004-08-05 3:46 ` Andrew Morton
2004-08-05 4:31 ` Gene Heskett
2004-08-05 0:44 ` Chris Shoemaker
2004-08-05 8:35 ` Denis Vlasenko
2004-08-05 14:14 ` Gene Heskett
2004-08-05 13:48 ` Gene Heskett
[not found] ` <200408210118.02011.vda@port.imtp.ilyichevsk.odessa.ua>
2004-08-21 1:40 ` Gene Heskett
2004-08-05 8:33 ` Denis Vlasenko
2004-08-05 14:19 ` Gene Heskett
[not found] ` <200408070203.35268.vda@port.imtp.ilyichevsk.odessa.ua>
2004-08-07 1:28 ` Gene Heskett
2004-08-05 21:26 ` Chris Shoemaker
2004-08-05 7:25 ` Linus Torvalds
2004-08-05 7:31 ` Andrew Morton
2004-08-05 8:33 ` Denis Vlasenko
2004-08-05 14:55 ` Gene Heskett
2004-08-05 16:26 ` Linus Torvalds
2004-08-05 18:06 ` Ingo Molnar
2004-08-05 18:50 ` Linus Torvalds
2004-08-05 20:29 ` Andi Kleen
[not found] ` <20040806073739.GA6617@elte.hu>
2004-08-06 11:31 ` Andi Kleen
[not found] ` <20040806004231.143c8bd2.akpm@osdl.org>
2004-08-06 8:27 ` Ingo Molnar
2004-08-06 11:51 ` Gene Heskett
2004-08-06 16:58 ` Linus Torvalds
2004-08-06 17:16 ` Gene Heskett
2004-08-06 17:26 ` William Lee Irwin III
2004-08-06 23:19 ` Chris Shoemaker
2004-08-07 4:15 ` William Lee Irwin III
2004-08-07 0:05 ` Chris Shoemaker
2004-08-07 5:50 ` William Lee Irwin III
2004-08-06 23:09 ` Chris Shoemaker
2004-08-07 6:20 ` Linus Torvalds
2004-08-07 12:38 ` Gene Heskett
2004-08-07 13:44 ` Chris Shoemaker
2004-08-07 18:49 ` Linus Torvalds
2004-08-07 19:01 ` Gene Heskett
2004-08-06 17:16 ` Linus Torvalds
2004-08-05 21:10 ` Chris Shoemaker
2004-08-06 2:03 ` Gene Heskett
2004-08-06 2:12 ` Gene Heskett
2004-08-06 2:50 ` Linus Torvalds
2004-08-06 3:18 ` viro
2004-08-06 3:24 ` Linus Torvalds
2004-08-08 4:42 ` Gene Heskett
2004-08-08 14:30 ` Gene Heskett
2004-08-08 18:39 ` Andrew Morton
2004-08-10 4:12 ` Gene Heskett
2004-08-11 3:42 ` Gene Heskett
2004-08-11 3:46 ` Linus Torvalds
2004-08-11 4:18 ` Udo A. Steinberg
2004-08-11 5:13 ` Linus Torvalds
2004-08-11 5:15 ` Linus Torvalds
2004-08-11 5:33 ` Udo A. Steinberg
2004-08-11 14:37 ` Gene Heskett
2004-08-12 1:26 ` Nick Piggin
2004-08-12 2:23 ` Gene Heskett
2004-08-12 2:36 ` Nick Piggin
2004-08-13 1:00 ` Udo A. Steinberg
2004-08-13 1:31 ` Linus Torvalds
2004-08-13 2:03 ` Gene Heskett
2004-08-13 2:27 ` Andreas Dilger
2004-08-13 3:33 ` Linus Torvalds
2004-08-20 7:02 ` Udo A. Steinberg
2004-08-20 7:11 ` Andrew Morton
2004-08-20 7:19 ` Udo A. Steinberg
2004-08-20 7:49 ` Nick Piggin
2004-08-24 6:08 ` Udo A. Steinberg
2004-08-24 7:41 ` Nick Piggin
2004-08-24 18:20 ` Marcelo Tosatti
2004-08-24 20:00 ` Andrew Morton
2004-08-24 18:40 ` Marcelo Tosatti
2004-08-25 0:27 ` Marcelo Tosatti
2004-09-12 7:03 ` Udo A. Steinberg
2004-09-12 7:16 ` Andrew Morton
2004-09-12 7:29 ` Udo A. Steinberg
2004-09-12 7:48 ` Andrew Morton
[not found] ` <20040912004812.3544c6de.akpm-3NddpPZAyC0@public.gmane.org>
2004-09-13 4:53 ` Len Brown
2004-09-13 4:53 ` Len Brown
2004-08-11 5:55 ` David S. Miller
2004-08-11 4:47 ` Gene Heskett
2004-08-11 4:59 ` Linus Torvalds
2004-08-11 8:05 ` Roger Luethi
2004-08-13 4:27 ` Gene Heskett
2004-08-13 8:32 ` Gene Heskett
2004-08-14 2:18 ` Marcelo Tosatti
2004-08-14 5:19 ` Gene Heskett
2004-08-14 5:50 ` Gene Heskett
2004-08-14 8:17 ` Gene Heskett
2004-08-15 4:09 ` Gene Heskett
2004-08-15 8:48 ` viro
2004-08-15 9:42 ` Gene Heskett
2004-08-15 17:31 ` Andrew Morton
2004-08-15 17:58 ` Gene Heskett
2004-08-15 9:50 ` Gene Heskett
2004-08-15 10:36 ` viro
2004-08-15 10:10 ` Gene Heskett
2004-08-15 10:37 ` viro
2004-08-15 10:42 ` Gene Heskett
2004-08-15 11:00 ` viro
[not found] ` <200408150704.49312.gene.heskett@verizon.net>
2004-08-15 11:26 ` viro
2004-08-15 17:47 ` Gene Heskett
[not found] ` <200408152257.04773.vda@port.imtp.ilyichevsk.odessa.ua>
2004-08-15 20:33 ` Gene Heskett
[not found] ` <200408160803.15206.vda@port.imtp.ilyichevsk.odessa.ua>
2004-08-16 6:32 ` Gene Heskett
2004-08-16 14:13 ` Gene Heskett
[not found] ` <200408161749.23663.vda@port.imtp.ilyichevsk.odessa.ua>
2004-08-16 15:25 ` Gene Heskett
2004-08-16 22:52 ` Gene Heskett
2004-08-16 23:01 ` viro
2004-08-17 4:44 ` Gene Heskett
2004-08-17 4:58 ` Nick Piggin
2004-08-17 5:26 ` Gene Heskett
2004-08-17 11:57 ` Nick Piggin
2004-08-19 9:41 ` Gene Heskett
2004-08-19 18:36 ` Marcelo Tosatti
2004-08-20 2:38 ` Gene Heskett
2004-08-20 7:33 ` Marcelo Tosatti
2004-08-20 15:06 ` Gene Heskett
2004-08-20 15:43 ` V13
2004-08-20 17:29 ` Gene Heskett
2004-08-20 18:13 ` Marc Ballarin
2004-08-20 20:08 ` Gene Heskett
2004-08-21 9:25 ` Barry K. Nathan
2004-08-21 18:31 ` V13 [this message]
2004-08-21 18:55 ` Gene Heskett
2004-08-22 11:04 ` Helge Hafting
2004-08-22 11:40 ` Gene Heskett
2004-08-20 20:11 ` R. J. Wysocki
2004-08-20 20:17 ` Gene Heskett
2004-08-22 5:05 ` Gene Heskett
2004-08-22 11:42 ` R. J. Wysocki
2004-08-24 2:34 ` Tom Vier
2004-08-24 3:08 ` Gene Heskett
2004-08-25 1:49 ` Tom Vier
2004-08-25 2:33 ` Gene Heskett
2004-08-25 14:55 ` Martin J. Bligh
2004-08-25 17:23 ` Ryan Cumming
2004-08-25 17:36 ` Martin J. Bligh
2004-08-27 14:01 ` Gene Heskett
2004-08-25 6:13 ` Denis Vlasenko
2004-08-29 13:48 ` Gene Heskett
2004-08-29 14:34 ` Possible dcache BUG [u] Martin Schlemmer [c]
2004-08-29 15:21 ` Possible dcache BUG Rafael J. Wysocki
2004-08-29 17:23 ` Denis Vlasenko
2004-08-29 22:25 ` Gene Heskett
-- strict thread matches above, loose matches on Subject: below --
2004-08-05 14:54 Brett Charbeneau
[not found] <2oKTA-5CQ-65@gated-at.bofh.it>
[not found] ` <2r0U7-3yx-9@gated-at.bofh.it>
[not found] ` <2rwhh-BX-15@gated-at.bofh.it>
[not found] ` <2rShM-7QP-5@gated-at.bofh.it>
[not found] ` <2rSrs-7Vn-1@gated-at.bofh.it>
[not found] ` <2rSUw-8lw-3@gated-at.bofh.it>
[not found] ` <2rTGR-se-3@gated-at.bofh.it>
[not found] ` <2rUjF-Od-11@gated-at.bofh.it>
2004-08-11 12:32 ` Andi Kleen
2004-08-20 8:08 Daniel Blueman
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=200408212131.38019.v13@priest.com \
--to=v13@priest.com \
--cc=Ballarin.Marc@gmx.de \
--cc=barryn@pobox.com \
--cc=gene.heskett@verizon.net \
--cc=linux-kernel@vger.kernel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.