I was getting these same errors when I was running the following kernel: kernel-lustre-smp-2.6.18-92.1.17.el5_lustre.1.6.7.1.x86_64 These errors went away when I started using 2.6.22.19 with lustre patches + OFED-1.4.2 (http://www.openfabrics.org/downloads/OFED/ofed-1.4.2/OFED-1.4.2.tgz) on the Lustre servers. Nirmal