Bug 207400 - numactl missing nodebind info on dual core systems
numactl missing nodebind info on dual core systems
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: numactl (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Neil Horman
Depends On:
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Reported: 2006-09-20 18:25 EDT by Bryn M. Reeves
Modified: 2007-11-16 20:14 EST (History)
1 user (show)

See Also:
Fixed In Version: RHBA-2007-0202
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-05-01 13:48:27 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
numactl output (923 bytes, text/plain)
2006-09-20 18:25 EDT, Bryn M. Reeves
no flags Details
correct numa_parse_bitmap for dual core systems (542 bytes, patch)
2006-09-21 10:54 EDT, Bryn M. Reeves
no flags Details | Diff
reviced patch (516 bytes, patch)
2006-09-21 11:18 EDT, Bryn M. Reeves
no flags Details | Diff

  None (edit)
Description Bryn M. Reeves 2006-09-20 18:25:53 EDT
Description of problem:
numactl does not output nodebind information for all cores in a dual core system.

Version-Release number of selected component (if applicable):

$ for i in `seq 0 7`; do taskset -c $i numactl --show | grep nodebind; done
nodebind: 0
nodebind: 1
nodebind: 2
nodebind: 3

On this system (dl585), core id's > 0 are not reported.
Also reported to affect other AMD dual core systems.

Problem still exists in numactl-0.9.8-1.33.

Reported as fixed upstream in 0.9.10.
Comment 1 Bryn M. Reeves 2006-09-20 18:25:57 EDT
Created attachment 136791 [details]
numactl output
Comment 2 Neil Horman 2006-09-21 07:21:39 EDT
I think you were testing with a too-early release.  There should be a nodebind
patch in numactl-0.9.8-1.35 (the changelog release numbers appear to be a bit off).
Comment 3 Bryn M. Reeves 2006-09-21 09:57:10 EDT
Re-tested with 0.9.8-1.35 - same problem.

I've confirmed now that this was fixed upstream between 0.9.9 and 0.9.10 on our

At least that gives a smaller set of changes to look at than from the RHEL4 / 5
packages to 0.9.10.
Comment 4 Bryn M. Reeves 2006-09-21 10:54:41 EDT
Created attachment 136862 [details]
correct numa_parse_bitmap for dual core systems

I've narrowed the problem down to a one-line change in numa_parse_bitmap - we
weren't handling the case when the first while loop terminates on a ','

I've tested this myself on the dl585 - building an RPM now based on the RHEL5
package with this change.

Proposed patch taken directly from  0.9.10.
Comment 5 Neil Horman 2006-09-21 11:07:05 EDT
please set the RHEL5 version back to waiting on tech please, and I'll fix this
in both locations
Comment 6 Bryn M. Reeves 2006-09-21 11:18:03 EDT
Created attachment 136867 [details]
reviced patch

earlier patch had borked path
Comment 7 Neil Horman 2006-09-21 12:09:55 EDT
fixed in release -1.37.  Thanks!
Comment 11 Neil Horman 2006-10-23 10:48:21 EDT
Kent, see comment #7.  Backported in -1.37
Comment 17 Red Hat Bugzilla 2007-05-01 13:48:27 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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