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

[Juergen Gross <jgross@xxxxxxxx>]

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.
>>
>> Ping?
> 
> I was waiting an ack from tools maintainers before looking for a release
> perspective.
> 
> 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. :-)
Cons: There is a more general solution (as Roger pointed out), but
      this would require much more work.


Juergen

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