Bug 1032393 - qemu-kvm needs to handle snapshot=on with passthrough devices (iSCSI LUN or block device)
Summary: qemu-kvm needs to handle snapshot=on with passthrough devices (iSCSI LUN or b...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: qemu-kvm
Version: 6.5
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Jeff Cody
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 1032369
Blocks: 1034993 1073368 1090374 1090379 1131974 1359965
TreeView+ depends on / blocked
 
Reported: 2013-11-20 05:28 UTC by Sibiao Luo
Modified: 2017-12-06 12:20 UTC (History)
15 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1032369
: 1090374 1090379 (view as bug list)
Environment:
Last Closed: 2017-12-06 12:20:57 UTC
Target Upstream Version:

Attachments (Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Comment 1 Sibiao Luo 2013-11-20 05:30:17 UTC 
rhel6.5 also hit the same issue.
host info:
2.6.32-425.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.415.el6.x86_64

# /usr/libexec/qemu-kvm -M rhel6.5.0 -cpu SandyBridge -enable-kvm -m 4G -smp 4 -name rhel6.5 -rtc base=localtime,clock=host,driftfix=slew -uuid 6afa5f93-2d4f-420f-81c6-e5fdddbd1c83 -vnc :1 -monitor stdio -drive file=/dev/sda1,if=none,id=drive-data-disk,format=raw,cache=none,aio=native,werror=stop,rerror=stop,snapshot=on -device virtio-scsi-pci,bus=pci.0,addr=0x7,id=scsi0 -device scsi-block,drive=drive-data-disk,id=data-disk,bus=scsi0.0
qemu-kvm: -device scsi-block,drive=drive-data-disk,id=data-disk,bus=scsi0.0: scsi-block: scsi generic interface too old
qemu-kvm: -device scsi-block,drive=drive-data-disk,id=data-disk,bus=scsi0.0: Device 'scsi-block' could not be initialized

Best Regards,
sluo
Comment 2 Sibiao Luo 2013-11-20 05:41:19 UTC 
Also tried the rhel6.4GA that still hit this issue, so not a regression issue.

host info:
# uname -r && rpm -q qemu-kvm-rhev
2.6.32-425.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.355.el6.x86_64

Best regards,
sluo
Comment 3 Paolo Bonzini 2013-11-20 12:34:44 UTC 
"-snapshot/snapshot=on" are not supposed to work with iSCSI LUNs or scsi-block.

The bug is actually that we can create a live snapshot of a passthrough device.
Comment 4 Eric Blake 2014-04-02 02:49:24 UTC 
Libvirt doesn't use -snapshot (or snapshot=on), so refusing to support it in qemu should have no impact on libvirt.
Comment 13 Jan Kurik 2017-12-06 12:20:57 UTC 
Red Hat Enterprise Linux 6 is in the Production 3 Phase. During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.

The official life cycle policy can be reviewed here:

http://redhat.com/rhel/lifecycle

This issue does not meet the inclusion criteria for the Production 3 Phase and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification. Note that a strong business justification will be required for re-evaluation. Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL:

https://access.redhat.com/
Note You need to log in before you can comment on or make changes to this bug.