linux-kernel - Re: [PATCH] KVM: s390: Fix access to unavailable adapter indicator pages during postcopy

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Message-ID: <c9fe5d6e-c280-4480-a522-a99fa5ce7cb2@redhat.com>
Date: Tue, 26 Aug 2025 14:16:31 +0200
From: Thomas Huth <thuth@...hat.com>
To: Janosch Frank <frankja@...ux.ibm.com>,
 Claudio Imbrenda <imbrenda@...ux.ibm.com>, kvm@...r.kernel.org
Cc: Peter Xu <peterx@...hat.com>,
 Christian Borntraeger <borntraeger@...ux.ibm.com>,
 David Hildenbrand <david@...hat.com>, Heiko Carstens <hca@...ux.ibm.com>,
 Vasily Gorbik <gor@...ux.ibm.com>, Alexander Gordeev
 <agordeev@...ux.ibm.com>, Sven Schnelle <svens@...ux.ibm.com>,
 linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: s390: Fix access to unavailable adapter indicator
 pages during postcopy

On 26/08/2025 13.43, Janosch Frank wrote:
> On 8/21/25 5:23 PM, Thomas Huth wrote:
>> From: Thomas Huth <thuth@...hat.com>
>>
>> When you run a KVM guest with vhost-net and migrate that guest to
>> another host, and you immediately enable postcopy after starting the
>> migration, there is a big chance that the network connection of the
>> guest won't work anymore on the destination side after the migration.
> 
> Do we want to add this?
> 
> Fixes: f65470661f36 ("KVM: s390/interrupt: do not pin adapter interrupt pages")

Yes, that sounds like a good idea, please add it when picking up the patch!

  Thanks,
   Thomas