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Re: [Xen-devel] [patch] kexec is not highmem-aware

To: "Stephen C. Tweedie" <sct@xxxxxxxxxx>
From: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Date: Wed, 27 Jun 2007 16:43:54 +0100
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Gerd Hoffmann <kraxel@xxxxxxxxxx>
Delivery-date: Wed, 27 Jun 2007 08:41:56 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

On Mon, 2007-06-18 at 16:11 +0100, Ian Campbell wrote:
> I guess xen_create_contiguous_region is happy to operate on a
> temporarily kmapped page which are immediately unmapped since we only
> care that the MFN has been moved below the limit.

Turns out this is not the case, x_c_c_r doesn't work for highmem and
kmap gets very upset if the p2m mapping changes under its feet.

I think 78:0be610b725fa in the linux-2.6.18-xen.hg staging tree
addresses the issue.

Ian.

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References:
- [Xen-devel] [patch] kexec is not highmem-aware
  - From: Stephen C. Tweedie
- Re: [Xen-devel] [patch] kexec is not highmem-aware
  - From: Ian Campbell

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