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

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Message-ID: <d91ed0a4-16b2-417d-9b44-6e0d629f65d0@linux.ibm.com>
Date: Tue, 26 Aug 2025 13:43:12 +0200
From: Janosch Frank <frankja@...ux.ibm.com>
To: Thomas Huth <thuth@...hat.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 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")