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Bug 845968 - numatune command can't handle nodeset with '^' for excluding a node
Summary: numatune command can't handle nodeset with '^' for excluding a node
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: libvirt
Version: 6.4
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: ---
Assignee: Osier Yang
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-08-06 10:37 UTC by hongming
Modified: 2013-02-21 07:21 UTC (History)
7 users (show)

Fixed In Version: libvirt-0.10.0-0rc1.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-02-21 07:21:15 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2013:0276 0 normal SHIPPED_LIVE Moderate: libvirt security, bug fix, and enhancement update 2013-02-20 21:18:26 UTC

Description hongming 2012-08-06 10:37:47 UTC 
Description of problem:
When use numatune command to set nodeset with '^' for excluding a node,the following error occurs.And it also can be reproduced in libvirt-0.9.13-2.el6.x86_64. It can pass with "\^" , but there isn't any records about it. 
error: Unable to change numa parameters
error: unable to set numa tunable: Invalid argument


Quote from man virsh
nodeset is a list of numa nodes used by the host for running the domain. Its syntax is a comma separated list, with ’-’ for ranges and ’^’ for excluding a node. 

Version-Release number of selected component (if applicable):
libvirt-0.10.0-0rc0.el6.x86_64
qemu-kvm-0.12.1.2-2.295.el6.x86_64
numad-0.5-4.20120522git.el6.x86_64
kernel-2.6.32-279.el6.x86_64 

How reproducible:


Steps to Reproduce:
1. numactl --hardware
available: 8 nodes (0-7)


2.# virsh numatune rhel6q
numa_mode      : strict
numa_nodeset   : 1


3.virsh numatune rhel6q --nodeset 0-5,^2
error: Unable to change numa parameters
error: unable to set numa tunable: Invalid argument


Actual results:
error: Unable to change numa parameters
error: unable to set numa tunable: Invalid argument


Expected results:
The numatuen is able to set the nodesetwith '^' for excluding a node.


Additional info:
Comment 2 Osier Yang 2012-08-16 08:48:19 UTC 
commit 29d8ed7a61a9bf5d971a3111b226474384384bfc
Author: Osier Yang <jyang>
Date:   Thu Aug 16 11:35:04 2012 +0800

    qemu: Ensure the cpuset is formatted as expected before passing to cgroup
    
    The parameter value for cpuset could be in special format like
    "0-10,^7", which is not recognized by cgroup. This patch is to
    ensure the cpuset is formatted as expected before passing it to
    cgroup. As a side effect, after the patch, it parses the cpuset
    early before cgroup setting, to avoid the rollback if cpuset
    parsing fails afterwards.
Comment 4 Wayne Sun 2012-08-23 07:04:27 UTC 
# rpm -q libvirt
libvirt-0.10.0-0rc1.el6.x86_64

steps:
# virsh list --all
 Id    Name                           State
----------------------------------------------------
 1     libvirt_test_api               running

# virsh numatune libvirt_test_api
numa_mode      : strict
numa_nodeset   : 1


# virsh numatune libvirt_test_api --nodeset 0-2,^1

# virsh numatune libvirt_test_api
numa_mode      : strict
numa_nodeset   : 0,2

This is working now.
Comment 5 errata-xmlrpc 2013-02-21 07:21:15 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.

http://rhn.redhat.com/errata/RHSA-2013-0276.html
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