Myklebust, Trond wrote: Can you try to turn on the callback debugging ('echo 256 > /proc/sys/sunrpc/nfs_debug')? A wireshark trace of what is going on during the hang itself might also help. It doesn't fail with callback debugging turned on. I suspect the output to my slow serial console disrupts the timing. The trace is in http://www.citi.umich.edu/projects/nfsv4/pnfs/block/download/089.pcap -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html