From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Vrabel <david.vrabel@citrix.com>
Subject: Re: [PATCHv1] xen/balloon: disable memory hotplug in PV
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Date: Mon, 9 Mar 2015 15:13:40 +0000
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To: Boris Ostrovsky <boris.ostrovsky@oracle.com>, xen-devel@lists.xenproject.org
Cc: Daniel Kiper <daniel.kiper@oracle.com>
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On 09/03/15 15:09, Boris Ostrovsky wrote:
> On 03/09/2015 10:10 AM, David Vrabel wrote:
>> Memory hotplug doesn't work with PV guests because:
>>
>>    a) The p2m cannot be expanded to cover the new sections.
>>
>>    b) add_memory() builds page tables for the new sections which means
>>       the new pages must have valid p2m entries (or a BUG occurs).
> 
> Is this due to recent p2m rework?

(a) is but (b) has always meant memory hotplug on PV was broken.

David