From: Fabiano Rosas <farosas@suse.de>
To: Fiona Ebner <f.ebner@proxmox.com>, qemu-devel@nongnu.org
Cc: qemu-stable@nongnu.org, eduardo@habkost.net,
marcel.apfelbaum@gmail.com, philmd@linaro.org,
wangyanan55@huawei.com, zhao1.liu@intel.com,
marcandre.lureau@redhat.com, peterx@redhat.com
Subject: Re: [PATCH v2] ui/vdagent: add migration blocker when machine version < 10.1
Date: Thu, 12 Mar 2026 12:28:47 -0300 [thread overview]
Message-ID: <87zf4dxe1c.fsf@suse.de> (raw)
In-Reply-To: <20260310142552.240877-1-f.ebner@proxmox.com>
Fiona Ebner <f.ebner@proxmox.com> writes:
> In QEMU 10.1, commit 5d56bff11e ("ui/vdagent: add migration support")
> added migration support for the vdagent chardev and commit 42000e0013
> ("ui/vdagent: remove migration blocker") removed the migration
> blocker. No compat for older machine versions was added, so migration
> with pre-10.1 machine version, from a 10.1 binary to a pre-10.1 binary
> will result in a failure when loading the VM state in the target
> instance:
>
>> Unknown savevm section or instance 'vdagent' 0. Make sure that your
>> current VM setup matches your saved VM setup, including any
>> hotplugged devices
>
> Add a compat flag to block migration when the machine version is less
> than 10.1 to avoid this.
>
> Cc: qemu-stable@nongnu.org
> Fixes: 42000e0013 ("ui/vdagent: remove migration blocker")
> Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
prev parent reply other threads:[~2026-03-12 15:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-10 14:25 [PATCH v2] ui/vdagent: add migration blocker when machine version < 10.1 Fiona Ebner
2026-03-10 14:32 ` Marc-André Lureau
2026-03-12 15:28 ` Fabiano Rosas [this message]
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