[Qemu-devel] [PATCH for-2.4 v2 0/2] vhost: check if vhost has capacity for hotplugged memory

[Igor Mammedov]

v1->v2:
  * replace probbing with checking for
    /sys/module/vhost/parameters/max_mem_regions and
    if it's missing has non wrong value return
    hardcoded legacy limit (64 slots).

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         | 21 ++++++++++++++++++++-
 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, 65 insertions(+), 2 deletions(-)
 create mode 100644 stubs/vhost.c

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1.8.3.1