On 03.12.25 21:51, Ben Chaney wrote:
Changes since v2
- I have taken over this patch set since Steve retired
- Added comments to explain the order of events
- Remove redundant reversion to cleanup git history
- Inclusion of virtio and stub fixes
Tap and vhost devices can be preserved during cpr-transfer using
traditional live migration methods, wherein the management layer
creates new interfaces for the target and fiddles with 'ip link'
to deactivate the old interface and activate the new.
However, CPR can simply send the file descriptors to new QEMU,
with no special management actions required. The user enables
this behavior by specifing '-netdev tap,cpr=on'. The default
is cpr=off.
Signed-off-by: Ben Chaney<[email protected]>
Hi!
Hmm, note that I have alternative in-flight series,
[PATCH v9 0/8] virtio-net: live-TAP local migration
https://patchew.org/QEMU/[email protected]/
, which bring same thing: migrate TAP device, passing FDs
though migration channel. The benefit is that it doesn't
require additional migration channel.
So, it may be used as part of CPR-migration, or with
usual migration without CPR.
--
Best regards,
Vladimir
