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Bug 1148201 - attempts to live snapshot merge (commit) of the active layer hang
Summary: attempts to live snapshot merge (commit) of the active layer hang
Keywords:
Status: CLOSED DUPLICATE of bug 1062142
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.0
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Eric Blake
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 1041301 1062142 1130603
Blocks: 647386 837916 1035038 1045196 1150379 1196199
TreeView+ depends on / blocked
 
Reported: 2014-09-30 23:06 UTC by Eric Blake
Modified: 2016-04-26 16:46 UTC (History)
27 users (show)

Fixed In Version: libvirt-1.2.7-1.el7
Doc Type: Bug Fix
Doc Text:
Clone Of: 1062142
: 1150379 (view as bug list)
Environment:
Last Closed: 2015-01-14 19:40:48 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Comment 1 Jiri Denemark 2014-10-01 07:01:50 UTC 
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>
Comment 6 Shanzhi Yu 2014-12-25 02:34:55 UTC 
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
Comment 7 Eric Blake 2015-01-14 19:40:48 UTC 
(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 ***
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