Bug 1071199

Summary:	qemu-kvm numa emulation won't check duplicate node id
Product:	Red Hat Enterprise Linux 7	Reporter:	Shaolong Hu <shu>
Component:	qemu-kvm-rhev	Assignee:	Eduardo Habkost <ehabkost>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	low
Version:	7.0	CC:	flang, hhuang, juzhang, michen, mrezanin, rbalakri, virt-maint, ypu
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	QEMU 2.1.0	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-03-05 09:44:30 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:

Description Shaolong Hu 2014-02-28 09:04:18 UTC

Description of problem:
--------------------------
numa emulation won't check duplicate node id.


Version-Release number of selected component (if applicable):
-------------------------------------------------------------
qemu-kvm-rhev-1.5.3-50.el7.x86_64


How reproducible:
-------------------
100%


Steps to Reproduce:
----------------------
some negative test for numa:

1.
-numa node,mem=1024,cpus=0,nodeid=0 -numa node,mem=1024,cpus=1-2,nodeid=1 -numa node,mem=1024,cpus=2-3,nodeid=2
QEMU 1.5.3 monitor - type 'help' for more information
(qemu) info numa
3 nodes
node 0 cpus: 0
node 0 size: 1024 MB
node 1 cpus: 1
node 1 size: 1024 MB
node 2 cpus: 2 3
node 2 size: 1024 MB

2.
-numa node,mem=1024,cpus=0,nodeid=0 -numa node,mem=1024,cpus=1-5,nodeid=1 -numa node,mem=1024,cpus=3,nodeid=2
QEMU 1.5.3 monitor - type 'help' for more information
(qemu) info numa
3 nodes
node 0 cpus: 0
node 0 size: 1024 MB
node 1 cpus: 1 2
node 1 size: 1024 MB
node 2 cpus: 3
node 2 size: 1024 MB

3.
-numa node,mem=1024,cpus=0,nodeid=0 -numa node,mem=1024,cpus=1-5,nodeid=1 -numa node,mem=1024,cpus=3,nodeid=1
QEMU 1.5.3 monitor - type 'help' for more information
(qemu) info numa
3 nodes
node 0 cpus: 0
node 0 size: 1024 MB
node 1 cpus: 1 2 3
node 1 size: 1024 MB
node 2 cpus:
node 2 size: 0 MB



1 and 2 is tolerable, 3 may be a little trouble, in this case, guest only see one node(node 0), but this check can be done by high level tools like libvirt, so WONTFIX is also acceptable, that's why priority is low though severity is high.

Comment 4 Eduardo Habkost 2014-07-10 20:01:42 UTC

Moving to qemu-kvm-rhev. Patches were included upstream and will be on QEMU 2.1.0.

Comment 6 langfang 2014-08-27 07:29:04 UTC

Reproduce this bug as follow version:
Host:

qemu-kvm-rhev-1.5.3-60.el7ev.x86_64

Steps
1)Boot guest with numa nodes (nodeid has same number)
 ...-numa node,mem=1024,cpus=0,nodeid=0 -numa node,mem=1024,cpus=1-5,nodeid=1 -numa node,mem=1024,cpus=3,nodeid=1


Results:
guest can boot up

Verify this bus as follow version:

# uname -r
3.10.0-144.el7.x86_64
# rpm -q qemu-kvm-rhev
qemu-kvm-rhev-2.1.0-2.el7.x86_64

Steps as same as reproduce

Results:

qemu-kvm: -numa node,mem=1024,cpus=3,nodeid=1: Duplicate NUMA nodeid: 1

Comment 7 langfang 2014-08-28 02:38:29 UTC

as above test comment6,this bug has been fixed.

Comment 10 errata-xmlrpc 2015-03-05 09:44:30 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/RHSA-2015-0624.html