Bug 1030290

Summary:	incorrect description in qemu-kvm man page - 'SMP is supported with up to 255 CPUs.'
Product:	Red Hat Enterprise Linux 6	Reporter:	Chao Yang <chayang>
Component:	qemu-kvm	Assignee:	Eduardo Habkost <ehabkost>
Status:	CLOSED NOTABUG	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.5	CC:	acathrow, bsarathy, juzhang, michen, mkenneth, pschiffe, qzhang, virt-maint
Target Milestone:	rc	Keywords:	ManPageChange
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1078699 (view as bug list)		Environment:
Last Closed:	2014-05-27 20:17:46 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:	1078699

Description Chao Yang 2013-11-14 09:56:49 UTC

Description of problem:
We actually support up to 160 CPUs while starting a qemu-kvm instance. But doc says the NO. is 255. Booting guest with CPUs greater than 160 leads core dumped.

Version-Release number of selected component (if applicable):
qemu-kvm-0.12.1.2-2.415.el6_5.3.x86_64

How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:

Comment 2 Eduardo Habkost 2014-05-27 20:17:46 UTC

The QEMU man page is about QEMU as a whole, not about specific machine-types (which may have lower limits), or about specific accelerator limits (KVM has lower limits), or about what Red Hat supports.

QEMU itself supports up to 255 CPUs, but KVM and the rhel machine-types don't.