Re: Question about Xen reboot on panic

From: Meng Xu <xumengpanda@gmail.com>
To: Ian Campbell <ian.campbell@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Wei Liu <wei.liu2@citrix.com>,
	"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: Question about Xen reboot on panic
Date: Thu, 12 Nov 2015 10:09:55 -0500	[thread overview]
Message-ID: <CAENZ-+m5aaC=F_RW038g+stJJ58sRNDa850crbO6fZO7UDkR2g@mail.gmail.com> (raw)
In-Reply-To: <1447334165.18450.70.camel@citrix.com>

Hi Ian and Wei,

2015-11-12 8:16 GMT-05:00 Ian Campbell <ian.campbell@citrix.com>:
> On Thu, 2015-11-12 at 12:57 +0000, Wei Liu wrote:
>> On Thu, Nov 12, 2015 at 12:52:56PM +0000, Andrew Cooper wrote:
>> >
>> > In screen for example, you need to send CTRL-a a to send a "CTRL-a" on
>> > the serial.
>> >
>>
>> And for minicom it is "Ctrl-a Ctrl-a" to send "Ctrl-a".
>
> Now run minicom in screen ;-) (Ctrl-a a ?)
>
> I recommend using conswitch=x (for any letter x you like, although x is
> often good) on your hypervisor command line to change the Xen debug key to
> something which doesn't clash with things.

Thank you very much for your suggestions! :-) The "Ctrl-a a" x3 works
well on the screen when the Xen kernel hasn't crashed, but didn't work
once Xen kernel crashed. :-(

I will put some printk in the machine_restart as Andrew suggested to
see if I can find more information. If you happen to know any other
ways that I can try, could you let me know?

Thank you very much!

Best,

Meng

-----------
Meng Xu
PhD Student in Computer and Information Science
University of Pennsylvania
http://www.cis.upenn.edu/~mengxu/