Hi, After upgrading NFS client kernel to latest linux-next, NFS mount failed: # mount -t nfs pxe:/cc /cc mount.nfs: access denied by server while mounting pxe:/cc # uname -a Linux hp 2.6.31-rc6-next-20090818 #61 SMP Thu Aug 20 14:46:10 CST 2009 x86_64 GNU/Linux However server log says OK: Aug 20 15:02:09 wu-t61 mountd[4599]: authenticated mount request from 192.168.11.6:973 for /cc (/cc) Aug 20 15:02:09 wu-t61 mountd[4599]: authenticated unmount request from 192.168.11.6:974 for /cc (/cc) However-2: nfsroot can be mounted at boot time. Server kernel has always been 2.6.30. Any ideas? Thanks, Fengguang