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Re: [libvirt] [PATCH v2] qemu: Fix shutdown regression with buggy qemu

On 09/21/2011 08:06 AM, Jiri Denemark wrote:
The commit that prevents disk corruption on domain shutdown
(96fc4784177ecb70357518fa863442455e45ad0e) causes regression with QEMU
0.14.* and 0.15.* because of a regression bug in QEMU that was fixed
only recently in QEMU git. The affected versions of QEMU do not quit on
SIGTERM if started with -no-shutdown, which we use to implement fake
reboot. Since -no-shutdown tells QEMU not to quit automatically on guest
shutdown, domains started using the affected QEMU cannot be shutdown
properly and stay in a paused state.

This patch disables fake reboot feature on such QEMU by not using
-no-shutdown, which makes shutdown work as expected. However,
virDomainReboot will not work in this case and it will report "Requested
operation is not valid: Reboot is not supported with this QEMU binary".
  src/qemu/qemu_capabilities.c |    8 ++++++++
  src/qemu/qemu_capabilities.h |    1 +
  src/qemu/qemu_command.c      |    2 +-
  src/qemu/qemu_driver.c       |    6 ++++++
  4 files changed, 16 insertions(+), 1 deletions(-)


Eric Blake   eblake redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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