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Re: Segfaults on r4600

To: Guido Guenther <guido.guenther@gmx.net>
Subject: Re: Segfaults on r4600
From: Ralf Baechle <ralf@oss.sgi.com>
Date: Tue, 24 Jul 2001 05:24:42 +0200
Cc: linux-mips@oss.sgi.com
In-reply-to: <20010723194830.A9033@galadriel.physik.uni-konstanz.de>; from guido.guenther@gmx.net on Mon, Jul 23, 2001 at 07:48:30PM +0200
References: <20010723194830.A9033@galadriel.physik.uni-konstanz.de>
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mutt/1.2.5i
On Mon, Jul 23, 2001 at 07:48:30PM +0200, Guido Guenther wrote:

> I'm seeing various segfaults especially with perl on an R4600 Indy.
> R4000 I2 with identical debian packages works fine though. I have tried
> various kernels (cvs head as from two days ago(natively and
> crosscompiled) and 2.4.3-r4k-ip22 from rfc822.org. Interesting enough
> the segfaults disappear when using "strace -o/dev/null
> segfaulting_binary". I also tried to investigate the core file but gdb
> dies when loading it(gdb is 5.0-3 debian package).

Strace uses ptrace(2) which does enormous numbers of cache flushes.
Are those segfault non-deterministic?  Do the perl script you're running
do alot of I/O?

  Ralf

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