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Bug 667356 - xen: unplug the emulated devices at resume time
Summary: xen: unplug the emulated devices at resume time
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: Unspecified
OS: Unspecified
low
medium
Target Milestone: rc
: ---
Assignee: Paolo Bonzini
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-01-05 12:25 UTC by Paolo Bonzini
Modified: 2011-08-30 07:26 UTC (History)
4 users (show)

Fixed In Version: kernel-2.6.32-112.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-23 20:33:03 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:0542 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update 2011-05-19 11:58:07 UTC

Description Paolo Bonzini 2011-01-05 12:25:43 UTC 
Early after being resumed we need to unplug again the emulated devices.

Otherwise, after migration a PV-on-HVM domain will have again two NICs with the same MAC and two "views" of the same disk.

This is upstream commit 512b109e.
Comment 2 RHEL Program Management 2011-01-05 14:30:37 UTC 
This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.
Comment 3 Paolo Bonzini 2011-01-11 12:55:12 UTC 
In particular, migration may show messages like

ata1.00: ATA-7: QEMU HARDDISK, 0.8.2, max UDMA/100
ata1.00: 13687317 sectors, multi 16: LBA48
ata1.00: Drive reports diagnostics failure. This may indicate a drive
ata1.00: fault or invalid emulation. Contact drive vendor for information.
ata1.00: configured for MWDMA2
scsi 0:0:0:0: Direct-Access      ATA      QEMU HARDDISK    0.8. PQ: 0 ANSI: 5
scsi 0:0:0:0: Attached scsi generic sg1 type 0
Comment 4 Aristeu Rozanski 2011-02-03 17:25:22 UTC 
Patch(es) available on kernel-2.6.32-112.el6
Comment 7 Yufang Zhang 2011-04-07 08:02:43 UTC 
QA verified this bug with 2.6.32-128.el6:

1. start a xen hvm guest with 2.6.32-128.el6 kernel installed.

2. check vif and xvd* devices within the guest.

3. save and restore the guest.

At step 2, no emulated devices are shown within the guest; At step 3, still no emulated devices are shown within the guest after restore.

So change this bug to VERIFIED.
Comment 8 errata-xmlrpc 2011-05-23 20:33:03 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0542.html
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