Bug 667356 – xen: unplug the emulated devices at resume time

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 667356 - xen: unplug the emulated devices at resume time

Summary:	xen: unplug the emulated devices at resume time

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	6.0
Hardware:	Unspecified Unspecified

Priority	low Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Paolo Bonzini
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2011-01-05 07:25 EST by Paolo Bonzini
Modified:	2011-08-30 03:26 EDT (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	kernel-2.6.32-112.el6
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-05-23 16:33:03 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0542	normal	SHIPPED_LIVE	Important: Red Hat Enterprise Linux 6.1 kernel security, bug fix and enhancement update	2011-05-19 07:58:07 EDT

Groups: None (edit)

Description Paolo Bonzini 2011-01-05 07:25:43 EST

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 Product and Program Management 2011-01-05 09:30:37 EST

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 07:55:12 EST

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 12:25:22 EST

Patch(es) available on kernel-2.6.32-112.el6

Comment 7 Yufang Zhang 2011-04-07 04:02:43 EDT

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 16:33:03 EDT

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

Note You need to log in before you can comment on or make changes to this bug.