[Pkg-libvirt-maintainers] Bug#1107536: Bug#1107536: PPC64LE: Device hotplug/unplug requires guest reboot

[Andrea Bolognani]

On Mon, Jun 09, 2025 at 09:50:24AM +0530, Trupti wrote:
> Package: libvirt-daemon
> Severity: important
> Tags: trixie ppc64el
> 
> Version Info:
> 
> Host/Guest OS: Debian Trixie/sid (powerpc64le)
> Kernel: 6.12.27-powerpc64le-64k
> QEMU: 10.0.0
> Libvirt: 11.3.0
> 
> Issue:
> 
> Live-attaching or detaching a device with virsh on a Debian Trixie (ppc64le)
> guest does not take effect immediately. While the host command succeeds, the
> guest OS only recognizes the change after a full reboot. This defeats the
> purpose of the hotplug feature.
> 
> Steps to reproduce:
> 1) Start a guest with Debian-Trixie OS same as Host
> 2) Attach an interface to guest using below virsh attach-device command
>    'virsh attach-interface --live vm bridge --source virbr0'
> 3) The command executes successfully and give output as "Interface attached
> successfully"
> 4) But the interface is not immediately attached to guest. When the guest is
> rebooted , then the
>    interface is seen on the guest.
> 5) Same is happening with virsh detach-interface command. A guest reboot is
> required to remove
>    the interface from guest

What's the output of attach-interface if you pass the --print-xml
flag to it? What does the full live XML look like before and after
the operation?

Honestly this sounds like a guest OS issue rather than a bug in
libvirt. Is any message produced in dmesg/journal as a consequence of
the hotplug operation?

-- 
Andrea Bolognani <eof at kiyuko.org>
Resistance is futile, you will be garbage collected.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/pkg-libvirt-maintainers/attachments/20250609/2719f2fc/attachment.sig>