Re: [PATCH 0/2] vhost-user: drop support for postcopy+CONFIGURE_MEM_SLOTS

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Sep 16, 2026 at 09:29:15PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Hi all!
> 
> The combination of postcopy and CONFIGURE_MEM_SLOTS is neither properly
> documented nor correctly implemented, see details in 01. I suggest to
> drop it for now, and document that fact.
> 
> Vladimir Sementsov-Ogievskiy (2):
>   vhost-user: drop postcopy support for CONFIGURE_MEM_SLOTS case
>   vhost-user: drop extra "else" in vhost_user_set_mem_table_postcopy()

what I get, after reading 1: , memory hotplug is broken with this,
indeed. However, pretty much everyone negotiates CONFIGURE_MEM_SLOTS
so this would just break postcopy for everyone, no?

Not a good tradeoff.

How about we just fix the issues, or at least the major ones?

>  docs/interop/vhost-user.rst |  30 +++-
>  hw/virtio/vhost-user.c      | 296 +++++++++++-------------------------
>  2 files changed, 116 insertions(+), 210 deletions(-)
> 
> -- 
> 2.43.0