From: Ralf Baechle <ralf@linux-mips.org>
To: Peter Horton <phorton@bitbox.co.uk>
Cc: linux-mips@linux-mips.org
Subject: Re: Kernel 2.4.23 on Cobalt Qube2 - area of problem
Date: Sat, 13 Dec 2003 18:07:51 +0100 [thread overview]
Message-ID: <20031213170751.GB13271@linux-mips.org> (raw)
In-Reply-To: <3FD99C34.9090001@bitbox.co.uk>
On Fri, Dec 12, 2003 at 10:45:08AM +0000, Peter Horton wrote:
> More info on the random segmentation faults and data corruption on my Qube2.
>
> 2.4.21 from CVS is the first kernel to exhibit the problem. I tracked it
> down to the cache handling changes that went in between 2.4.20 and 2.4.21.
>
> By (not very scientifically) removing flush_dcache_page() and
> re-instating flush_page_to_ram() I managed to get the 2.4.21 kernel
> stable (see attached patch). Applying a similiar patch to 2.4.23 (CVS
> HEAD) allows me to run 2.4.23 too.
>
> I don't know how to track the problem any further - the kernel's cache
> handling is a bit out of my league.
>
> Anyone got a clue stick they can point me in the right direction with ?
Can you put a printk into c-r4k.c and print the value of the
shm_align_mask variable? I want to make sure it's got a sane value on
your box. Also the first few lines of your bootup messages with the
processor and cache stuff would be useful.
Ralf
next prev parent reply other threads:[~2003-12-13 17:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-12 10:45 Kernel 2.4.23 on Cobalt Qube2 - area of problem Peter Horton
2003-12-13 17:07 ` Ralf Baechle [this message]
2003-12-13 18:20 ` Peter Horton
2003-12-13 18:38 ` Peter Horton
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=20031213170751.GB13271@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=linux-mips@linux-mips.org \
--cc=phorton@bitbox.co.uk \
/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.