[Bug 1317491] [NEW] virsh blockcommit hangs at 100%

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Rafael David Tinoco (inaddy):

[Impact]

 * Virsh can't merge snapshots using the Block Commit technique
 * It is only possible to merge base to top image (not the opposite)
 * Combination of libvirt v1.2.2 and QEMU 2 is no good for Block Commit
 * After this fix, virsh won't hang on the opration, will cause an error

[Test Case]

 * Workaround in Commit #10
 * QEMU is fine in Commit #11
 * Test Case in Commit #12

[Regression Potential]

 * Block commit (Already broken) would continue not working
 * Its a small fix based on upstream fix (to block this function)

[Other Info]
 
## Original Case Description

virsh blockcommit hangs at 100% and nothing happens.

I only found the following discussion:
http://t358434.emulators-libvirt-user.emulatortalk.info/virsh-blockcommit-hangs-at-100-t358434.html

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: libvirt (Ubuntu Trusty)
     Importance: Medium
     Assignee: Rafael David Tinoco (inaddy)
         Status: In Progress

** Affects: libvirt (Ubuntu Xenial)
     Importance: Undecided
         Status: Fix Released

** Affects: libvirt (Ubuntu Yakkety)
     Importance: Undecided
         Status: Fix Released

** Affects: libvirt (Ubuntu Zesty)
     Importance: Undecided
         Status: Fix Released


** Tags: sts
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virsh blockcommit hangs at 100%
https://bugs.launchpad.net/bugs/1317491
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