Reproduce with qemu-kvm-0.12.1.2-2.195.el6

qemu-kvm support snapshot_blkdev command in monito

Verified with  qemu-kvm-0.12.1.2-2.199.el6

Results:
(qemu) snapshot_blkdev
unknown command: 'snapshot_blkdev'
(qemu)

Don't forget QMP! :)

(In reply to comment #10)
> Don't forget QMP! :)

Thanks for your kindly reminder.retested with qemu-kvm-0.12.1.2-2.199.el6


{"execute":"query-commands"}{"execute":"query-commands"},can not find blockdev-snapshot-sync

{"return": [{"name": "block_stream"}, {"name": "block_job_cancel"}, {"name": "block_job_set_speed"}, {"name": "quit"}, {"name": "eject"}, {"name": "__com.redhat_drive_del"}, {"name": "change"}, {"name": "screendump"}, {"name": "__com.redhat_qxl_screendump"}, {"name": "stop"}, {"name": "cont"}, {"name": "system_reset"}, {"name": "system_powerdown"}, {"name": "device_add"}, {"name": "device_del"}, {"name": "cpu"}, {"name": "memsave"}, {"name": "pmemsave"}, {"name": "inject-nmi"}, {"name": "migrate"}, {"name": "migrate_cancel"}, {"name": "migrate_set_speed"}, {"name": "client_migrate_info"}, {"name": "migrate_set_downtime"}, {"name": "block_resize"}, {"name": "netdev_add"}, {"name": "netdev_del"}, {"name": "balloon"}, {"name": "set_link"}, {"name": "getfd"}, {"name": "closefd"}, {"name": "block_passwd"}, {"name": "set_password"}, {"name": "expire_password"}, {"name": "__com.redhat_set_password"}, {"name": "__com.redhat_spice_migrate_info"}, {"name": "qmp_capabilities"}, {"name": "human-monitor-command"}, {"name": "__com.redhat_drive_add"}, {"name": "query-version"}, {"name": "query-commands"}, {"name": "query-chardev"}, {"name": "query-block"}, {"name": "query-blockstats"}, {"name": "query-cpus"}, {"name": "query-kvm"}, {"name": "query-status"}, {"name": "query-mice"}, {"name": "query-vnc"}, {"name": "query-spice"}, {"name": "query-name"}, {"name": "query-uuid"}, {"name": "query-migrate"}, {"name": "query-balloon"}, {"name": "query-block-jobs"}]}

2.{"execute":"blockdev-snapshot-sync"}
{"execute":"blockdev-snapshot-sync"}
{"error": {"class": "CommandNotFound", "desc": "The command blockdev-snapshot-sync has not been found", "data": {"name": "blockdev-snapshot-sync"}}}

Moving to ON_QA because Errata Tool did not do it

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
We don't need tech notes for this one, because this functionality has been disabled and is not present in any RHEL release.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1531.html