Bug 1342927

Summary:	KVM: fix guest stalls when booting with more than one vcpu
Product:	Red Hat Enterprise Linux 7	Reporter:	Andrew Jones <drjones>
Component:	kernel-aarch64	Assignee:	Andrew Jones <drjones>
kernel-aarch64 sub component:	KVM	QA Contact:	Virtualization Bugs <virt-bugs>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	chayang, juzhang, mlangsdo, virt-maint
Version:	7.3	Keywords:	OtherQA
Target Milestone:	rc
Target Release:	---
Hardware:	aarch64
OS:	Unspecified
Whiteboard:
Fixed In Version:	kernel-aarch64-4.5.0-0.40.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-11-03 22:43:29 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:	1174832

Description Andrew Jones 2016-06-06 06:57:41 UTC

For kernel-4.5.0-0.34.el7 we backported

a6e707ddbdf1 KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW

but then started seeing long stalls during guest boot when the guest was configured with more than one vcpu. We see now that we missed two other commits,

9006a01829a5: hrtimer: Catch illegal clockids
9c808765e88e: hrtimer: Add support for CLOCK_MONOTONIC_RAW

but, more importantly, all three of them have been reverted upstream with

82e88ff1ea948 hrtimer: Revert CLOCK_MONOTONIC_RAW support

Reverting RHEL commit 34b1eaee69f2, which is the backport of a6e707ddbdf1, has resolved the boot stalls. Under this bug we'll post a revert of it.

Comment 3 errata-xmlrpc 2016-11-03 22:43:29 UTC

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.

https://rhn.redhat.com/errata/RHBA-2016-2145.html