Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation

Andrew Cooper
2013-01-02T11:26:48Z

On 27/12/12 18:02, Eric W. Biederman wrote:
> Andrew Cooper<andrew.cooper3@citrix.com> writes:
>
>> On 27/12/2012 07:53, Eric W. Biederman wrote:
>>> The syscall ABI still has the wrong semantics.
>>>
>>> Aka totally unmaintainable and umergeable.
>>>
>>> The concept of domU support is also strange. What does domU support even mean, when the dom0 support is loading a kernel to pick up Xen when Xen falls over.
>> There are two requirements pulling at this patch series, but I agree
>> that we need to clarify them.
> It probably make sense to split them apart a little even.
>
>

Thinking about this split, there might be a way to simply it even more.

/sbin/kexec can load the "Xen" crash kernel itself by issuing hypercalls
using /dev/xen/privcmd. This would remove the need for the dom0 kernel
to distinguish between loading a crash kernel for itself and loading a
kernel for Xen.

Or is this just a silly idea complicating the matter?

~Andrew