FYI, Just spend the better part of the day debugging a weird issue. Running 'yum update' on a CentOS-6.5 VM causes a kernel OOPS on the host :-( The oops is in the nfs module (_put_nfs_open_context) and it looks like there is work being done on it. Kernel(s) tried are all 3.16.x. Switching back to the latest F19 kernel (is an updated system) and then there is no crash anymore. Tried all kinds of variations with different NFS servers, different hosts, different kernels but I get the OOPS always during the yum update sooner or later. (updated ofcourse a lot of things before I hit this :-( ) Regards, Joop