Bug 671147 – xen 64-bit PV guests fail to save-restore with kernels >= -95

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

Bug 671147 - xen 64-bit PV guests fail to save-restore with kernels >= -95

Summary:	xen 64-bit PV guests fail to save-restore with kernels >= -95

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:	All Linux

Priority	high Severity high
Target Milestone:	rc
Target Release:	---
Assigned To:	Andrew Jones
QA Contact:	Virtualization Bugs
Docs Contact:

URL:
Whiteboard:
Keywords:	Regression

Depends On:
Blocks:	653816
	Show dependency tree / graph

Reported:	2011-01-20 10:23 EST by Andrew Jones
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 16:38:14 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 Andrew Jones 2011-01-20 10:23:32 EST

A patch to the scheduler

83cd4fe sched: Change nohz idle load balancing logic to push model

exposed a deadlock in xen code that was fixed with

4877c73 xen: Do not suspend IPI IRQs.

That patch relies on 

ba461f0 powerpc: Use IRQF_NO_SUSPEND not IRQF_TIMER for non-timer interrupts
2dd9320 ixp4xx-beeper: Use IRQF_NO_SUSPEND not IRQF_TIMER for non-timer interrupt
685fd0b irq: Add new IRQ flag IRQF_NO_SUSPEND

and enables

6903591 xen: events: do not unmask event channels on resume

backport those 5 patches.

Comment 1 RHEL Product and Program Management 2011-01-20 11:10:45 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 Aristeu Rozanski 2011-02-03 11:46:51 EST

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

Comment 7 Jinxin Zheng 2011-04-06 06:21:48 EDT

I can reproduce this on kernel -96. Saving the 64-bit pv domU via xm save leads to endless wait and can only be killed by xm destroy.

With kernel -128 the guest could be successfully saved and restored. I'm moving this to VERIFIED.

Comment 8 errata-xmlrpc 2011-05-23 16:38:14 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.