Bug 680983

Summary:	RFE: ACPI doesn't use global lock
Product:	Red Hat Enterprise Linux 7	Reporter:	Alex Williamson <alex.williamson>
Component:	qemu-kvm	Assignee:	Alex Williamson <alex.williamson>
Status:	CLOSED DEFERRED	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	low	Docs Contact:
Priority:	medium
Version:	7.0	CC:	bsarathy, chayang, flang, juzhang, knoel, mkenneth, pbonzini, tburke, virt-maint
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	7.0
Hardware:	x86_64
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-11-05 22:30:06 UTC	Type:	---
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:	580953

Description Alex Williamson 2011-02-28 17:19:34 UTC

Description of problem:
We don't seem to be providing or making use of the ACPI global lock when manipulating data structures shared between qemu and the OSPM.  For instance, piix4_device_hotplug clears and sets bits in pci0_status that could be simultaneously in use by the OSPM.  It seems like we need to add global lock support and audit all shared data accesses for such races.

Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.148.el6

How reproducible:
n/a

Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info: