I reverted to linux-image-2.6.38-15-generic-pae (2.6.38-15.61) and the NFS performance is back to normal, and the CPU load dropped down to almost nothing, as before. This is clearly a linux kernel regression.
I reverted to linux-image- 2.6.38- 15-generic- pae (2.6.38-15.61) and the NFS performance is back to normal, and the CPU load dropped down to almost nothing, as before. This is clearly a linux kernel regression.