On 12.06.2026 18:51, Andrey Drobyshev wrote:
Host<-->guest connections via vsock sockets aren't yet supported for
live update / CPR-style migration. This series adds such support.
It's based on the vhost-related basis submitted earlier by Steve, Ben
and Mark at [0]. Patches 1-3 are rework of this submission, adjusted to
the latest master branch and with respect to Fabiano's review comments.
Essentially we want the host<-->guest connection to survive the CPR
migration. For that to happen, we preserve the vhost FD and issue
VHOST_RESET_OWNER ioctl on the source side before the VHOST_SET_OWNER is
issued on the target.
VHOST_RESET_OWNER is currently not supported by the Linux vsock driver.
We've implemented this support and there's a kernel series complementary
to this one.
I think we normally wait with merging QEMU support for a proposed kernel
feature until that feature is actually in kernel.
Thanks,
Maciej
