Bug 1004743 - XSAVE migration format not compatible between RHEL6 and RHEL7
Summary: XSAVE migration format not compatible between RHEL6 and RHEL7
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Eduardo Habkost
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On: 1016736
Blocks: 889670 915399
TreeView+ depends on / blocked
 
Reported: 2013-09-05 11:50 UTC by Paolo Bonzini
Modified: 2014-06-18 03:35 UTC (History)
9 users (show)

Fixed In Version: qemu-kvm-1.5.3-11.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1004773 1016736 (view as bug list)
Environment:
Last Closed: 2014-06-13 09:36:33 UTC
Target Upstream Version:

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Description Paolo Bonzini 2013-09-05 11:50:57 UTC 
VMState format for XSAVE data is incompatible between RHEL6 and RHEL7.

RHEL6 used a subsection, RHEL7 bumped the version number.  As a result, SandyBridge, Haswell, Opteron_G4 and Opteron_G5 CPU models cannot be migrated to RHEL7.
Comment 2 Paolo Bonzini 2013-09-06 15:19:04 UTC 
*** Bug 997702 has been marked as a duplicate of this bug. ***
Comment 3 huiqingding 2013-09-11 02:04:29 UTC 
I duplicate this bug to bug 997702, as talked to Paolo:

https://bugzilla.redhat.com/show_bug.cgi?id=997702#c11

*** This bug has been marked as a duplicate of bug 997702 ***
Comment 4 Paolo Bonzini 2013-10-10 09:44:08 UTC 
This affects all models, not just those listed.
Comment 5 Eduardo Habkost 2013-10-17 14:44:00 UTC 
(In reply to Paolo Bonzini from comment #4)
> This affects all models, not just those listed.

Does it? If xsave is not enabled on CPUID, the xsave section will be skipped.
Comment 7 Paolo Bonzini 2013-10-18 07:20:48 UTC 
See bug 1016736 comment 4.  But it is possible that for non-XSAVE models the problem is the ACPI one.
Comment 8 Miroslav Rezanina 2013-10-31 07:56:21 UTC 
Fix included in qemu-kvm-1.5.3-11.el7
Comment 10 FuXiangChun 2013-11-11 08:10:12 UTC 
Verify this bug with qemu-kvm-1.5.3-18.el7.x86_64.rpm

Testd four cpu model(include xsave flag)
1. Opteron_G5 2. Opteron_G4 3. Hasswell 4. SandyBridge

Tested seven cpu models(not include xsave flag)

AMD cpu model: Opteron_G1,Opteron_G2 and Opteron_G3
Intel cpu model:Westmere,Nehalem,Penryn and Conroe

All cpu model above works well when migrating from rhel6.5 to rhel7.0 host.


Base on this result above. This bug is fixed.
Comment 12 Ludek Smid 2014-06-13 09:36:33 UTC 
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.
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