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[Qemu-devel] [PATCH for-2.4 v3 0/3] vhost: check if vhost has capacity f
From: |
Igor Mammedov |
Subject: |
[Qemu-devel] [PATCH for-2.4 v3 0/3] vhost: check if vhost has capacity for hotplugged memory |
Date: |
Thu, 30 Jul 2015 12:11:56 +0200 |
v2->v3:
* add refcounting of limit by # vhost devices,
and make vhost_has_free_slot() return true if no vhost devices
are present at current moment
* move limit initialization to vhost_dev_init()
* fail vhost backend intialization if memslots number is more than its
supported limit
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 (3):
vhost: add vhost_has_free_slot() interface
pc-dimm: add vhost slots limit check before commiting to hotplug
vhost: fail backend intialization if memslots number is more than its
supported limit
hw/mem/pc-dimm.c | 7 +++++++
hw/virtio/vhost-backend.c | 21 ++++++++++++++++++++-
hw/virtio/vhost-user.c | 8 +++++++-
hw/virtio/vhost.c | 29 +++++++++++++++++++++++++++++
include/hw/virtio/vhost-backend.h | 2 ++
include/hw/virtio/vhost.h | 1 +
stubs/Makefile.objs | 1 +
stubs/vhost.c | 6 ++++++
8 files changed, 73 insertions(+), 2 deletions(-)
create mode 100644 stubs/vhost.c
--
1.8.3.1
- [Qemu-devel] [PATCH for-2.4 v3 0/3] vhost: check if vhost has capacity for hotplugged memory,
Igor Mammedov <=