linux-kernel - Re: [PATCH -mm 1/2] kexec/i386: kexec page table code clean up

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Date:	Mon, 14 Jan 2008 13:29:36 +0000
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Simon Horman <horms@...ge.net.au>
Cc:	Vivek Goyal <vgoyal@...hat.com>,
	"Huang, Ying" <ying.huang@...el.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>
Subject: Re: [PATCH -mm 1/2] kexec/i386: kexec page table code clean up -
	add arch_kimage


On Thu, 2008-01-10 at 17:15 +0900, Simon Horman wrote: 
> > Have you tested Xen too? Does it run into issues with this change?
> 
> Xen will need to be updated for this change but it shouldn't be a big
> deal. Basically right now it calls __ma() (which is kind of like __pa())
> on kexec_pgd and friends. Updating the arguments to __ma() to use
> the new arch_kimage pointers should be easy enough.

I think you mean the Xen specific parts of the kexec machinery in the
kernel.c would need updating rather than the hypervisor, right?

I don't think these changes will cause anything more than minor problems
for whoever ports the Xen kexec stuff upstream.

> N.B: As this is Dom0 code (not DomU) it is maintained in the xen
> repository and has been merged into Linux.

I don't think we would bother backporting these changes to there, would
we?

Ian.


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