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This was fixed by v1.2.5-rc1-6-ge6bcbcd:
commit e6bcbcd32c70ae394e7b6a530012fe8b07a59b5d
Author: Eric Blake <eblake>
Date: Tue May 27 17:07:08 2014 -0600
qemu: reject rather than hang on blockcommit of active layer
qemu 2.0 added the ability to commit the active layer, but slightly
differently than what libvirt had been anticipating in its
implementation of the virDomainBlockCommit call. As a result, if
you attempt to do a 'virsh blockcommit $dom vda', qemu gets into a
state where it is waiting on libvirt to end the job, while libvirt
is waiting on qemu to end the job, and the guest is effectively
hung with regards to further commands for that block device.
I have patches coming down the pipeline that will add full support
for blockcommit of the active layer when coupled with qemu 2.0 or
later; but they depend on Peter's improvements to block job handling
and form enough of a new feature that they are not ready for
inclusion in the 1.2.5 release. So for now, just reject the
attempt, rather than letting the user get stuck. This is no worse
than the behavior of qemu 1.7 rejecting the job.
* src/qemu/qemu_driver.c (qemuDomainBlockCommit): Reject active
commit.
Signed-off-by: Eric Blake <eblake>
Hi Eric,
Seem this is a duplicate of bug 1150379 which already fixed on RHEL7.0.z. On RHEL7.1 bug is 1062142 which also has been VERIFIED. This one can be closed?
Thanks
(In reply to Shanzhi Yu from comment #6)
> Hi Eric,
>
> Seem this is a duplicate of bug 1150379 which already fixed on RHEL7.0.z. On
> RHEL7.1 bug is 1062142 which also has been VERIFIED. This one can be closed?
Yes - RHEL 7.1 resolved the hang by implementing things, instead of rejecting them. Closing this as duplicate.
*** This bug has been marked as a duplicate of bug 1062142 ***
This was fixed by v1.2.5-rc1-6-ge6bcbcd: commit e6bcbcd32c70ae394e7b6a530012fe8b07a59b5d Author: Eric Blake <eblake> Date: Tue May 27 17:07:08 2014 -0600 qemu: reject rather than hang on blockcommit of active layer qemu 2.0 added the ability to commit the active layer, but slightly differently than what libvirt had been anticipating in its implementation of the virDomainBlockCommit call. As a result, if you attempt to do a 'virsh blockcommit $dom vda', qemu gets into a state where it is waiting on libvirt to end the job, while libvirt is waiting on qemu to end the job, and the guest is effectively hung with regards to further commands for that block device. I have patches coming down the pipeline that will add full support for blockcommit of the active layer when coupled with qemu 2.0 or later; but they depend on Peter's improvements to block job handling and form enough of a new feature that they are not ready for inclusion in the 1.2.5 release. So for now, just reject the attempt, rather than letting the user get stuck. This is no worse than the behavior of qemu 1.7 rejecting the job. * src/qemu/qemu_driver.c (qemuDomainBlockCommit): Reject active commit. Signed-off-by: Eric Blake <eblake>