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Bug 1252053

Summary: net-snmp does not display correct lm_sensors sensor data / missing CPU cores
Product: Red Hat Enterprise Linux 7 Reporter: Dalibor Pospíšil <dapospis>
Component: net-snmpAssignee: Jan Safranek <jsafrane>
Status: CLOSED ERRATA QA Contact: Dalibor Pospíšil <dapospis>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 7.1   
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Cause: snmpd expected, that sensor names reported by lm_sensors library are unique. However, on systems with multiple sockets with Xeon family CPUs, the thermal sensors on all CPUs have the same name. Consequence: snmpd reported temperature only of one CPU. Fix: snmpd adds prefix to all sensors, that have the same name. Result: snmpd reports temperature of all CPUs. For example, on 2-socket machine with two-core CPUs, the old snmpd reported just two thermal sensors (from the first CPU) in LM-SENSORS-MIB::lmTempSensorsTable: lmTempSensorsDevice.2 = STRING: Core 0 lmTempSensorsDevice.3 = STRING: Core 1 With this update, all four thermal sensors are reported. Notice the prefix of second set of sensor names: lmTempSensorsDevice.2 = STRING: Core 0 lmTempSensorsDevice.3 = STRING: Core 1 lmTempSensorsDevice.6 = STRING: coretemp-isa-0004:Core 0 lmTempSensorsDevice.7 = STRING: coretemp-isa-0004:Core 1 The first set of sensors is kept without prefix to keep compatibility with old applications, which may expect sensor named 'Core 0'.
 Story Points: ---
Clone Of: 967871 Environment:
Last Closed: 2015-11-19 11:46:14 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 Dalibor Pospíšil 2015-08-10 14:48:53 UTC 
+++ This bug was initially created as a clone of Bug #967871 +++

Description of problem:  Using Dell R620 hardware with dual Dual Intel Xeon E5-2670 Eight Core, net-snmp fails to show data for all CPU cores detected by lm_sensors.  Only a subset are displayed.


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

net-snmp-5.7.2-20.el7
Comment 4 errata-xmlrpc 2015-11-19 11:46:14 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-2015-2345.html