Comment 13 for bug 1124250

Confirmed on ubuntu 14.04 kernel 3.13.0-27-generic with NFSv4 mounts to an Isilon filesystem - even with very high values for the various kernel.keys parameters, we still get sporadic failures for UID/username mappings resulting in user or group IDs on new files showing up as 4294967294 rather than the correct value.

Our LDAP has < 250 users, and I've set these sysctl values on the NFS clients:

kernel.keys.gc_delay = 300
kernel.keys.maxbytes = 20000
kernel.keys.maxkeys = 10000
kernel.keys.persistent_keyring_expiry = 259200
kernel.keys.root_maxbytes = 400000
kernel.keys.root_maxkeys = 10000