-----Original Message----- From: Daniel P. Berrangé [mailto:berrange@redhat.com] Sent: Monday, July 6, 2020 9:48 PM To: Wangxin (Alexander, Cloud Infrastructure Service Product Dept.) <wangxinxin.wang(a)huawei.com&gt; Cc: libvir-list(a)redhat.com; mkletzan(a)redhat.com; Huangweidong (C) <weidong.huang(a)huawei.com&gt; Subject: Re: [question]qemu: any plan to support ivshmem-plain migration? On Mon, Jul 06, 2020 at 01:14:04PM +0000, Wangxin (Alexander, Cloud Infrastructure Service Product Dept.) wrote: > Hi, Martin > > Ivshmem-plain device support property role with 'master'(master=on) or > 'peer'(master=off, default mode), which controls to copy the shared memory on migration to the destination host or not. > https://git.qemu.org/?p=qemu.git;a=blob;f=docs/system/ivshmem.rst;h=b0 > 3a48afa3ae7258bbe43490180fc5732b1f6c8c;hb=HEAD > > And libvirt does not support to configure 'role' yet, see msg > https://www.redhat.com/archives/libvir-list/2016-August/msg00591.html > > Qemu use 'master=off' as ivshmem-plain default property, the guest create by libvirt api can't be migrated now. > > Do you have an plan to support the property 'role' and ivshmem-palin migration? I would assume no one is actively working on it since it is 4 years since that quoted message. If you wish to try to implement it, we'll review any patches.

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