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Bug 901631

Summary: AHCI doesn't support migration
Product: Red Hat Enterprise Linux 7 Reporter: Kevin Wolf <kwolf>
Component: qemu-kvmAssignee: John Snow <jsnow>
Status: CLOSED WONTFIX QA Contact: Virtualization Bugs <virt-bugs>
Severity: high Docs Contact:
Priority: high    
Version: 7.0CC: bili, dapospis, hhuang, huding, jsnow, juzhang, knoel, michen, nerijus, pbonzini, qzhang, rbalakri, shuang, virt-bugs, virt-maint, xwei
Target Milestone: pre-dev-freeze   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-06-05 16:18:24 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:    
Bug Blocks: 922007, 1004480, 1227278    

Description Kevin Wolf 2013-01-18 17:14:25 UTC 
The current upstream AHCI emulation does not support live migration. Patches from Jason Baron exist, but tests have shown that they don't work reliably under I/O load (the guest kernel freezes or crashes occasionally after live migration), so upstream is going to apply, but disable them.

This needs some debugging to find the reason for the failures, so that the feature can be enabled for RHEL 7.
Comment 6 Ademar Reis 2013-08-01 02:10:44 UTC 
This is a complex feature and we won't be able to deliver it in RHEL7.0. Deferring it to RHEL7.1 at least.

And it should probably be reassigned to someone working on ahci itself upstream.
Comment 7 Xiaoqing Wei 2014-01-02 09:15:36 UTC 
*** Bug 1047450 has been marked as a duplicate of this bug. ***
Comment 8 Peter Krempa 2014-01-07 10:16:45 UTC 
*** Bug 1049259 has been marked as a duplicate of this bug. ***
Comment 11 juzhang 2014-06-12 01:28:14 UTC 
Hi Huding,

Could you have a try and add comment?

Best Regards,
Junyi
Comment 17 Peter Krempa 2014-07-07 07:55:57 UTC 
*** Bug 1023852 has been marked as a duplicate of this bug. ***
Comment 19 Paolo Bonzini 2015-06-05 16:18:24 UTC 
Won't be fixed in qemu-kvm except through rebase.