[PATCH v6 0/2] fix ENOSPC issue of iobus dev

[Amos Kong <akong@redhat.com>]

Boot up qemu-kvm guest with 232 multiple functions disks, qemu
will report a ENOSPC error, it's not good to statically increase
iobus array. This patchset makes kvm_io_range array can be
resized dynamically, and change dev limit to 1000.

Changes from v1:
- fix typo: kvm_io_bus_range -> kvm_io_range

Changes from v2:
- unregister device only when it exists

Changes from v3:
- set upper bounds to limit userspace

Changes from v4:
- check if allocate successfully before memcpy()
- separate the change to 1000 devs to a new patch

Changes from v5:
- memcpy() two times, drop sort

---

Amos Kong (2):
      KVM: resize kvm_io_range array dynamically
      KVM: set upper bounds for iobus dev to limit userspace


 include/linux/kvm_host.h |    5 +++--
 virt/kvm/kvm_main.c      |   38 ++++++++++++++++++--------------------
 2 files changed, 21 insertions(+), 22 deletions(-)

-- 
Amos Kong