Bug 674663 – vlapic: Fix possible guest tick losing after save/restore

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Bug 674663 - vlapic: Fix possible guest tick losing after save/restore

Summary:	vlapic: Fix possible guest tick losing after save/restore

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 5
Classification:	Red Hat
Component:	kernel-xen (Show other bugs)
Sub Component:
Version:	5.6
Hardware:	Unspecified Unspecified

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

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	514490 KernelXenUpstreamHV
	Show dependency tree / graph

Reported:	2011-02-02 15:44 EST by Paolo Bonzini
Modified:	2012-02-20 22:30 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2012-02-20 22:30:16 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2012:0150	normal	SHIPPED_LIVE	Moderate: Red Hat Enterprise Linux 5.8 kernel update	2012-02-21 02:35:24 EST

Groups: None (edit)

Description Paolo Bonzini 2011-02-02 15:44:59 EST

From http://permalink.gmane.org/gmane.comp.emulators.xen.devel/94955:

> Guest vcpu may totally lose all ticks if the vlapic->pt.irq was not restored 
> during save/restore process. Fix it.

This is upstream c/s 22470.

No testcase, but the bug is present in our version of vlapic too.

Comment 3 Laszlo Ersek 2011-07-13 13:21:17 EDT

Paolo posted
http://post-office.corp.redhat.com/archives/rhkernel-list/2011-July/msg00609.html

Comment 4 RHEL Product and Program Management 2011-08-04 00:14:22 EDT

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 7 Jarod Wilson 2011-08-23 09:59:29 EDT

Patch(es) available in kernel-2.6.18-282.el5
You can download this test kernel (or newer) from http://people.redhat.com/jwilson/el5
Detailed testing feedback is always welcomed.

Comment 9 Qin Guan 2012-01-18 02:54:29 EST

Testing of this problem is covered by running acceptance/functional test with several Snapshot builds (from Snapshot1 to Snapshot4). 

No any problem found during the testing, marked it as Verified:SanityOnly.

Comment 11 errata-xmlrpc 2012-02-20 22:30:16 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2012-0150.html

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