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RE: [Fedora-xen] kernel-xen crash dump analysis



I monitor my main dom0 machine with ttywatch and capture the output from
any crashes on the "other" machine. I had a lot of crash problems with
FC5. Now running FC6, no crashes.

I'm assuming you're getting a crash dump on the console and would like
to capture that dump as text. If so, ttywatch is the ticket. 

-----Original Message-----
From: fedora-xen-bounces redhat com
[mailto:fedora-xen-bounces redhat com] On Behalf Of Dale Bewley
Sent: Wednesday, November 28, 2007 1:22 PM
To: fedora-xen
Subject: [Fedora-xen] kernel-xen crash dump analysis

After upgrading to F8 I still had a dom0 crash last night, but didn't
catch any output. I think it's still the null pointer dereference in
tcp_tso_segment, possibly  brought to prominence by traffic shaping in a
busy domU. 

I'd like to catch a crash dump the next time it happens so I can
(hopefully) intelligently report this bug somewhere.

I'm looking at 
http://fedoraproject.org/wiki/FC6KdumpKexecHowTo 
http://www.redhatmagazine.com/2007/08/15/a-quick-overview-of-linux-kerne
l-crash-dump-analysis/

There is no mention of Xen. I don't see a kernel-xen-debuginfo rpm for
f8 or even f7, but there is one for f9 in rawhide it appears. Is
kernel-debuginfo sufficient even if running xen? The versions differ, so
I would imagine not.

# yum --enablerepo=fedora-debuginfo list kernel-xen-debuginfo
kernel-debuginfo
Available Packages
kernel-debuginfo.x86_64                  2.6.23.1-49.fc8
updates-debuginf

# rpm -q kernel kernel-xen
kernel-2.6.23.1-49.fc8
kernel-xen-2.6.21-2950.fc8

Any advice on how capture some useful info from a crashing dom0 kernel?

--
Dale Bewley - Unix Administrator - Shields Library - UC Davis
GPG: 0xB098A0F3 0D5A 9AEB 43F4 F84C 7EFD  1753 064D 2583 B098 A0F3

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