I am seeing lots of entries like the one below on my ovirt nodes that have InfiniBand (ib0). Thread-13::ERROR::2014-02-06 19:03:52,906::netinfo::301::root::(speed) cannot read ib0 speed Traceback (most recent call last): File "/usr/lib64/python2.6/site-packages/vdsm/netinfo.py", line 297, in speed s = int(speedFile.read()) IOError: [Errno 22] Invalid argument I'm seeing related entries in system's syslog. Feb 6 18:58:31 vm02 vdsm root ERROR cannot read ib0 speed#012Traceback (most recent call last):#012 File "/usr/lib64/python2.6/site-packages/vdsm/netinfo.py", line 297, in speed#012 s = int(speedFile.read())#012IOError: [Errno 22] Invalid argument The file being read exists but I can't "cat" it. # cat /sys/class/net/ib0/speed cat: /sys/class/net/ib0/speed: Invalid argument Attached is full vdsm log. Host is CentOS 6.5. I just upgraded host from 3.3.2 to 3.3.3 and the errors are the same.