Comment 0 for bug 1687130

I'm experiencing input/output errors on mounting NFS-shares, starting from kernel 4.9 and above.

No errors logged to syslog, but the system reports IO-errors when reading from the mount after only a few seconds. Doesn't matter which program that are accessing the disk.

My problems started after upgrading to ubuntu 17.04, but I have narrowed it down to being present from ubuntu kernel 4.9 and above by installing kernels from the ubuntu kernel ppa - i.e. when downgrading to latest 4.8-kernel from the PPA, NFS starts working as expected even on ubuntu 17.04. So it's definetely kernel related.

Probably not a hardware error either as the bug is present when NFS is mounted over both eth0 and wlan0.

Only special thing in my setup is that NFS is mounted over an ssh-tunnel.

The NFS server runs an completely up to date ubuntu 16.04 LTS install.