Re: [Xen-devel] crashdump on PVM Dom0

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 28.08.17 at 10:01, <nickeysgo@xxxxxxxxx> wrote:
> I'm new to develop Xen and my first work is about its scheduler.
> After I modified Xen 4.5 source code, my custom Xen has had a problem,
> which it causes automatic reboot of Dom0 when I execute a micro benchmark
> program.
> To debug it, I have tried to use crashdump on Dom0 with the Xen but, I
> failed to enable it.
> My configurations are following:
> 
> 1. Base Xen version: 4.5 release
> 2. OS: Ubuntu 14.04 LTS
> 3. VM type: PVM
> 
> 4. Crashdump install:
> - install linux-crashdump
> - install kexec from source code with '--with-xen' option
> - modified '/etc/default/kdump-tools':
> 
>> USE_KDUMP=1
>>
> - kernel boot param setting(/etc/defualt/grub):
> 
>>
>> 
> GRUB_CMDLINE_LINUX="crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G
> :2048M,128G-:4096M@32M

It is Xen to control the reserved memory, so "crashkernel=" needs
to be put on the Xen command line (suitably modified to that Xen
actually understands it - see the command line option documentation).

Jan


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