Bug 707292

The box I've seen with no topology/ info appears to be a p4 zen dom0, so this might be a xen kernel thing.

a patch is out for review

commit 2a89d48fe747411f8c79038988292a3690691e36
Author: Adrian Likins <alikins>
Date:   Tue May 24 16:53:19 2011 -0400

    707292: Better counting of cpu sockets
    
    Look for physical_package_id if it exists. Handle it not being
    there for all cpu cores (i386 guest on x86_64 kvm guest).
    Handle it not existing at all (xen dom0).
    
    If all else fails, claim we have one cpu socket.

fixed in 2a89d48, rhel5.7 branch v 0.95.5.19

Partial Verification on s390x hardware where detection of the number of cpu sockets has been failing (see bug 696791)....

[root@ibm-z10-12 tmp]# uname -a
Linux ibm-z10-12.rhts.eng.bos.redhat.com 2.6.18-262.el5 #1 SMP Mon May 16 17:52:56 EDT 2011 s390x s390x s390x GNU/Linux
[root@ibm-z10-12 tmp]# rpm -q subscription-manager
subscription-manager-0.95.5.19-1.git.2.2a89d48.el5


[root@ibm-z10-12 tmp]# subscription-manager facts --list
cpu.core(s)_per_socket: 2
cpu.cpu(s): 2
cpu.cpu_socket(s): 1
distribution.id: Tikanga
distribution.name: Red Hat Enterprise Linux Server
distribution.version: 5.7
memory.memtotal: 508952
memory.swaptotal: 1048568
net.interface.eth0.broadcast: 10.16.71.255
net.interface.eth0.hwaddr: 02:de:ad:be:ef:0c
net.interface.eth0.ipaddr: 10.16.66.203
net.interface.eth0.netmask: 255.255.248.0
net.interface.lo.broadcast: 0.0.0.0
net.interface.lo.hwaddr: 00:00:00:00:00:00
net.interface.lo.ipaddr: 127.0.0.1
net.interface.lo.netmask: 255.0.0.0
net.interface.sit0.broadcast: unknown
net.interface.sit0.hwaddr: 00:00:00:00:00:00
net.interface.sit0.ipaddr: unknown
net.interface.sit0.netmask: unknown
network.hostname: ibm-z10-12.rhts.eng.bos.redhat.com
network.ipaddr: 10.16.66.203
system.entitlements_valid: False
uname.machine: s390x
uname.nodename: ibm-z10-12.rhts.eng.bos.redhat.com
uname.release: 2.6.18-262.el5
uname.sysname: Linux
uname.version: #1 SMP Mon May 16 17:52:56 EDT 2011
virt.host_type: ibm_systemz
ibm_systemz-zvm
virt.is_guest: True


The fix for this bugzilla is a partial continuation of the story from https://bugzilla.redhat.com/show_bug.cgi?id=696791#c4
Notice in the facts above, that on s390 the number of sockets is now set to 1 (presumably when detection of this hardware property fails as indicated in comment #3).  With respect to subscription availability based on sockets, this is a gracious default value.

Recreate/Verification of this bug is somewhat tricky.  Here we go...

Using beaker (jobs/90124) to provision an i386 machine with the kernel-xen...

[root@dell-pe1650-02 ~]# uname -a
Linux dell-pe1650-02.rhts.eng.bos.redhat.com 2.6.18-264.el5xen #1 SMP Tue May 24 15:28:04 EDT 2011 i686 i686 i386 GNU/Linux

Now let's recreate the problem...
[root@dell-pe1650-02 ~]# ls /sys/devices/system/cpu/
cpu0  cpu1
[root@dell-pe1650-02 ~]# ls /sys/devices/system/cpu/cpu0/
crash_notes  topology
[root@dell-pe1650-02 ~]# ls /sys/devices/system/cpu/cpu0/topology/
[root@dell-pe1650-02 ~]# ls /sys/devices/system/cpu/cpu1
crash_notes  online  topology
[root@dell-pe1650-02 ~]# ls /sys/devices/system/cpu/cpu1/topology/
[root@dell-pe1650-02 ~]# 
[root@dell-pe1650-02 ~]# for cpu in `ls -1 /sys/devices/system/cpu/ | egrep cpu[[:digit:]]`; do echo \"cpu `cat /sys/devices/system/cpu/$cpu/topology/physical_package_id`\"; done | grep cpu | uniq | wc -l
cat: /sys/devices/system/cpu/cpu0/topology/physical_package_id: No such file or directory
cat: /sys/devices/system/cpu/cpu1/topology/physical_package_id: No such file or directory
1

^^^ Note there is no physical_package_id file on this hardware, therefore subscription-manger does not know how to count the sockets...

Let's verify that subscription-manager-0.95.5.18-1.el5 (built before the fix for this bug) will NOT report a system fact for cpu_socket  

[root@dell-pe1650-02 ~]# rpm -q subscription-manager
subscription-manager-0.95.5.18-1.el5
[root@dell-pe1650-02 ~]# subscription-manager facts --list | grep cpu
[root@dell-pe1650-02 ~]# 

^^^ Verified the re-create that no cpu facts are known to subscription-manager

Now, let's install subscription-manager with this bug fix...

[root@dell-pe1650-02 ~]# rpm -q subscription-manager
subscription-manager-0.95.5.19-1.git.2.2a89d48.el5
[root@dell-pe1650-02 ~]# subscription-manager facts --list | grep cpu
cpu.core(s)_per_socket: 2
cpu.cpu(s): 2
cpu.cpu_socket(s): 1
[root@dell-pe1650-02 ~]# 

^^^ Verified that subscription provides a sockets value of 1 in case when topology/physical_package_id does not exist at all (xen dom0)

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 therefore 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.

http://rhn.redhat.com/errata/RHEA-2011-1078.html

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 therefore 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.

http://rhn.redhat.com/errata/RHEA-2011-1078.html