All of
 help / color / mirror / Atom feed
From: Meng Xu <>
To: Andrew Cooper <>
Cc: Wei Liu <>,
	"" <>
Subject: Re: Question about Xen reboot on panic
Date: Wed, 11 Nov 2015 18:21:32 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Andrew,

First, thank you so much for your super fast reply! I really appreciate it. :-)

2015-11-11 17:54 GMT-05:00 Andrew Cooper <>:
> On 11/11/2015 22:49, Meng Xu wrote:
>> Hi all,
>> I'm trying to work remotely with the machine I have. So I want Xen
>> automatically reboot if it experiences a panic.
>> When Xen panic, it says " Reboot in five seconds...". However, it does
>> not reboot. :-(
>> *** The xen boot command line on my machine is ***
>> multiboot   /boot/xen-4.6-unstable.gz placeholder
>> dom0_mem=8192M,max:8192M dom0_max_vcpus=8 sched=credit
>> com1=115200,8n1,pci console=com1,vga reboot=k panic=2 panic_on_oops=1
> Xen has no panic= or panic_on_oops= command line options.
> Please read the command line
> documentation(
> It is written and kept up to date for a reason.

Yes, I actually read it before I put the command options. I'm not
quite sure if it is most updated and I was hoping "what if it works".
Now I know it won't work for sure.

> Furthermore, you are force-overriding the normal reboot path with the
> keyboard controller.  You shouldn't need to do this unless you have some
> very wonky firmware.

I see. I removed it from the boot command line.

> Finally, I can't tell from your paste below, but ensure that you are
> always using a debug hypervisor.

The source file under the xen folder has
debug ?= y

In addition,  "xl dmesg |grep debug" gives me:

(XEN) Xen version 4.6-unstable (root@) (gcc (Ubuntu/Linaro
4.6.3-1ubuntu5) 4.6.3) debug=y Wed Nov 11 17:06:30 EST 2015

So I guess I'm using the debug hypervisor.

I reboot the system after removing all of those useless options (that
is, no more "reboot=k panic=2 panic_on_oops=1" in the Xen boot command

Is there anything else I can do to force Xen always reboot at panic or oops?

Thank you very much for your help!




Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania

  reply	other threads:[~2015-11-11 23:21 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-11 22:49 Question about Xen reboot on panic Meng Xu
2015-11-11 22:54 ` Andrew Cooper
2015-11-11 23:21   ` Meng Xu [this message]
2015-11-11 23:34     ` Andrew Cooper
2015-11-12  2:10       ` Meng Xu
2015-11-12 12:52         ` Andrew Cooper
2015-11-12 12:57           ` Wei Liu
2015-11-12 13:16             ` Ian Campbell
2015-11-12 15:09               ` Meng Xu
2015-11-12 15:07           ` Meng Xu
2015-11-12 16:13             ` Meng Xu
2015-11-12 16:57               ` Meng Xu
2015-11-12 17:08                 ` Jan Beulich
2015-11-12 19:54                   ` Meng Xu
2015-11-13  7:39                     ` Jan Beulich
2015-11-19  3:58                       ` Meng Xu
2015-11-19  7:26                         ` Jan Beulich

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='' \ \ \ \ \

* 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.