Re: [PATCH v13 0/8] virtio-net: live-TAP local migration

[Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>]

On 19.03.26 18:53, Vladimir Sementsov-Ogievskiy wrote:
> Hi all!
> 
> Here is a new migration parameter "local", which allows to
> enable local migration of TAP virtio-net backend (and maybe other
> devices and backends in future), including its properties and open
> fds.
> 
> With this new option, management software doesn't need to initialize
> new TAP and do a switch to it. Nothing should be done around
> virtio-net in local migration: it just migrates and continues to use
> same TAP device. So we avoid extra logic in management software, extra
> allocations in kernel (for new TAP), and corresponding extra delay in
> migration downtime.
> 
> v13:
> 01: simplify extra "else if" to "else"
> 03: reword documentation (with Markus), drop r-b [sorry, but to be sure,
>      that it is OK for Peter too]
> 06: - reword documentation
>      - error-out instead of silently ignore
>        br=, ifname=, sndbuf=, vnet_hdr=, when mentioned together
>        with new incoming-fds parameter.
>      - fix stealing packages from TAP by source qemu process after
>        source STOP

Based-on: <20260318113144.15697-1-vsementsov@yandex-team.ru>
    "[PATCH v4 00/13] net: refactoring and fixes"

-- 
Best regards,
Vladimir