Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian

From	Ingo Jürgensmann <ij@2013.bluespice.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian
Date	2016-07-25 14:30 +0200
Message-ID	<rYNbb-4vR-1@gated-at.bofh.it> (permalink)
References	(2 earlier) <rYNbb-4vR-7@gated-at.bofh.it> <rYNbb-4vR-9@gated-at.bofh.it> <rYNbb-4vR-11@gated-at.bofh.it> <rYNbb-4vR-13@gated-at.bofh.it> <rYNbb-4vR-15@gated-at.bofh.it>
Organization	WindfluechterNet

Cross-posted to 2 groups.

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On 25.07.2016 12:23, Wei Liu wrote:

First, thank you for replying! Very much appreciated! :)

> I did skim your emails. But the oops was happening in memcpy+0x6 which
> indicated it came back to the origin question why would it got an
> exception there.
> 
> Just by staring at the code doesn't get me anywhere. Without a concrete
> reproduction of the issue, I'm afraid I can't provide more input here.

Well, from my point of view, it happens quite often when accessing the 
server via SSH. For example today it crashed when I wanted to add 
something and after I clicked into putty and typed the first char. In 
another putty, where I have my netconsole log open, I instantly saw the 
oops.

But what exactly causing these kinds of reboots, I'm clueless as you 
too. Only that I do experience far more frequent crashes when accessing 
the server from workplace via putty on Windows than via SSH on OSX or 
Debian Linux.

> There are several moving parts:
> 0. Hardware
> 1. Xen hypervisor
> 2. Dom0 kernel
> Your report and the debian report suggested that Dom0 kernel is less
> likely to be the culprit because you've tried different Dom0 kernels.

As just written in the other mail, I already tried kernel 4.5 from 
backports. Still crashing.

> As for Xen, not sure if you would be up for trying a debug build from
> source tree. That would help provide information on whether this is a
> bug in Xen or not.

Will try to build from Debian source, but how to enable debug build?

-- 
Ciao...          //        http://blog.windfluechter.net
       Ingo     \X/     XMPP: ij@jabber.windfluechter.net

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Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Ingo Jürgensmann <ij@2013.bluespice.org> - 2016-07-25 14:30 +0200
  Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-07-25 15:30 +0200
    Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Andreas Ziegler <ml@andreas-ziegler.de> - 2016-07-29 14:00 +0200
      Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-07-29 15:10 +0200
      Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-08-02 11:30 +0200
        Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Ingo Jürgensmann <ij@2013.bluespice.org> - 2016-08-02 12:40 +0200
          Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-08-02 14:50 +0200
            Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Andreas Ziegler <ml@andreas-ziegler.de> - 2016-11-14 17:00 +0100
              Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-11-29 10:30 +0100
                Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Ingo Jürgensmann <ij@2013.bluespice.org> - 2016-11-29 22:10 +0100
                Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-12-01 14:40 +0100
                Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Wei Liu <wei.liu2@citrix.com> - 2016-12-01 15:10 +0100
                Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Ingo Jürgensmann <ij@2013.bluespice.org> - 2016-12-01 15:40 +0100
                Bug#804079: [Xen-devel] Kernel panic on Xen virtualisation in Debian Sander Eikelenboom <linux@eikelenboom.it> - 2016-12-01 16:10 +0100

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