Bug 1122792

Summary: qemu-img convert fail to trigger "l2_update_compressed" event using blkdebug.cfg
Product: Red Hat Enterprise Linux 7 Reporter: Sibiao Luo <sluo>
Component: qemu-kvmAssignee: Hanna Czenczek <hreitz>
Status: CLOSED WONTFIX QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0CC: acathrow, bsarathy, chayang, famz, hhuang, juzhang, kwolf, michen, mkenneth, qzhang, virt-bugs, virt-maint, xfu
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1122788 Environment:
Last Closed: 2014-07-29 14:33:34 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1122788    
Bug Blocks:    

Comment 1 Sibiao Luo 2014-07-24 06:13:43 UTC 
Both the qemu-kvm-rhev-2.1.0-3.el7ev.preview.x86_64 and qemu-kvm-rhev-1.5.3-60.el7ev.x86_64 can hit this issue too.

# qemu-img convert -c -f qcow2 -O qcow2 sourcecompress.qcow2 blkdebug:blkdebug.cfg:compressed.qcow2
qemu-img: blkdebug:blkdebug.cfg:compressed.qcow2: error while converting qcow2: Driver 'blkdebug' does not support image creation

Best Regards,
sluo
Comment 2 Hanna Czenczek 2014-07-29 14:33:34 UTC 
Closing because (as discussed for BZ 1122788) we don't need to be able to create files over blkdebug.

Also, in contrast to RHEL 6 (BZ 1122788), the error message is very clear in RHEL 7.

Max