Greetings. I am observing a case whereby NFS mounting seems to hang. A tcpdump trace reveals that it retries forever RPC and exchanging NFS messages without giving any warning or error message about what''s wrong. There is no firewall active, and the NFSserver (.1) has the client (.101) unconditionally allowed. It''s a simple mount -t nfs 192.168.100.1:/B/home/jengelh /home/jengelh -o tcp,intr,soft /B is a btrfs volume. Mounting an ext4 volume over NFS instead completes in a splitsecond. Attached is the pcap file (->wireshark pretty display for deciphering). It seems pretty much independent of the Linux kernel used; I can reproduce this in both 2.6.33-rc8 as well as 2.6.31.12.