From: Giuliano Pochini <pochini@shiny.it>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: Random crashes
Date: Thu, 28 Aug 2003 15:25:09 +0200 (CEST) [thread overview]
Message-ID: <XFMail.20030828152509.pochini@shiny.it> (raw)
In-Reply-To: <1062059514.1293.112.camel@gaston>
On 28-Aug-2003 Benjamin Herrenschmidt wrote:
>> > Strange. I haven't been reported such problems. Can you try an older kernel
>> > just in case ? Could also be bad ram...
>>
>> I tried 2.4.22 and I replaced the RAM. Nothing. Digging in the oops
>> collection I found this one which doesn't look very nice:
>>
>> Jul 23 21:37:55 localhost kernel: Machine check in kernel mode.
>> Jul 23 21:37:55 localhost kernel: Caused by (from SRR1=20009030): L1 Data Cache error
>>
>> I'll send the machine back for repair, altought I think they'll not even
>> notice the problem because it happens sporadically :(((
>
> Well... I'm not 100% sure the message is correct, though from what you say,
> it seems indeed there is a CPU fault...
Yes, but it happened only once. All the others were "normal" segfaults, in both
userspace and kernel space and hard lockups.
> What CPU is this exactly ? (/proc/cpuinfo)
processor : 0
cpu : 7455, altivec supported
clock : 1249MHz
revision : 3.3 (pvr 8001 0303)
bogomips : 1248.46
processor : 1
cpu : 7455, altivec supported
clock : 1249MHz
revision : 3.3 (pvr 8001 0303)
bogomips : 1248.46
total bogomips : 2496.92
machine : PowerMac3,6
motherboard : PowerMac3,6 MacRISC3 Power Macintosh
detected as : 129 (PowerMac G4 Windtunnel)
pmac flags : 00000000
L2 cache : 256K unified
memory : 512MB
pmac-generation : NewWorld
I'm reading the latest 7455 errata
http://e-www.motorola.com/files/32bit/doc/errata/MPC7455CE.pdf
but I don't see anything that can cause L1 errors.
Unrelated thing: tlbli instruction can cause problems on 7455 (bug.20).
arch/ppc/kernel/head.S does not use the suggested workaround.
Bye.
Giuliano.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-08-28 13:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-24 7:24 Random crashes Giuliano Pochini
2003-08-24 8:46 ` Benjamin Herrenschmidt
2003-08-24 15:44 ` Giuliano Pochini
2003-08-24 15:50 ` Benjamin Herrenschmidt
2003-08-27 20:06 ` Giuliano Pochini
2003-08-28 8:31 ` Benjamin Herrenschmidt
2003-08-28 13:25 ` Giuliano Pochini [this message]
2003-08-28 13:47 ` Benjamin Herrenschmidt
2003-08-28 17:02 ` linas
2003-08-29 7:17 ` Giuliano Pochini
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=XFMail.20030828152509.pochini@shiny.it \
--to=pochini@shiny.it \
--cc=benh@kernel.crashing.org \
--cc=linuxppc-dev@lists.linuxppc.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).