Re: [Qemu-devel] [PATCH 0/2] vhost: check if vhost has capacity for hotplugged memory

[Igor Mammedov <imammedo@redhat.com>]

On Mon, 20 Jul 2015 15:49:28 +0200
Igor Mammedov <imammedo@redhat.com> wrote:

> it's defensive patchset which helps to avoid QEMU crashing
> at memory hotplug time by checking that vhost has free capacity
> for an additional memory slot.
> 
> Igor Mammedov (2):
>   vhost: add vhost_has_free_slot() interface
>   pc-dimm: add vhost slots limit check before commiting to hotplug
> 
>  hw/mem/pc-dimm.c                  |  7 +++++++
>  hw/virtio/vhost-backend.c         | 23 ++++++++++++++++++++++-
>  hw/virtio/vhost-user.c            |  8 +++++++-
>  hw/virtio/vhost.c                 | 21 +++++++++++++++++++++
>  include/hw/virtio/vhost-backend.h |  2 ++
>  include/hw/virtio/vhost.h         |  1 +
>  stubs/Makefile.objs               |  1 +
>  stubs/vhost.c                     |  6 ++++++
>  8 files changed, 67 insertions(+), 2 deletions(-)
>  create mode 100644 stubs/vhost.c
> 

ping,

patches are not invasive and fix QEMU crash during memory hotplug
when running on kernels that have lower vhost memory slots limit.
Pls consider applying them for 2.4.