https://www.redhat.com/archives/linux-cachefs/2010-February/msg00022.html
It the bottom line still correct for current kernels 3.2*, 3.3*?
"You can also turn on NFS debugging for FS-Cache to see what it's doing:
echo $((0x800)) >/proc/sys/sunrpc/nfs_debug "
--
Regards,
Frank
"Jack of all, fubars"