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

From: Ian Campbell
Date: Mon Jan 07 2013 - 05:54:24 EST

On Mon, 2013-01-07 at 10:46 +0000, Andrew Cooper wrote:

> Given that /sbin/kexec creates a binary blob in memory, surely the most
> simple thing is to get it to suitably mlock() the region and give a list
> of VAs to the hypervisor.

More than likely. The DOMID_KEXEC thing was just a radon musing ;-)

> This way, Xen can properly take care of what it does with information
> and where. For example, at the moment, allowing dom0 to choose where
> gets overwritten in the Xen crash area is a recipe for disaster if a
> crash occurs midway through loading/reloading the crash kernel.

That's true. I think there is a double buffering scheme in the current
thing and we should preserve that in any new implementation.


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