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Re: [Xen-devel] [for-4.10] Re: [PATCH v2] tools/libxl: mark special pages as reserved in e820 map for PVH

Hi Juergen,

On 12/05/2017 04:19 PM, Juergen Gross wrote:
On 05/12/17 16:23, Julien Grall wrote:
Hi Juergen,

On 04/12/17 15:49, Juergen Gross wrote:
On 21/11/17 12:06, Juergen Gross wrote:
The "special pages" for PVH guests include the frames for console and
Xenstore ring buffers. Those have to be marked as "Reserved" in the
guest's E820 map, as otherwise conflicts might arise later e.g. when
hotplugging memory into the guest.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
This is a bugfix for PVH guests. Please consider for 4.10.


I was waiting an ack from tools maintainers before looking for a release

I would recommend to tag your patch is 4.10 to help reviewers prioritize
review on your patch. I have done it now.

I am looking at releasing Xen 4.10 in the next few days. Can you explain
the pros/cons of this patch?

Pros: PVH guests with 4GB of memory or more will work. :-)

They never worked before? Or is it a regression? If it is a regression when did it appear?

Cons: There is a more general solution (as Roger pointed out), but
       this would require much more work.


Julien Grall

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