read RPC.
Severity : enhancement
+Bugzilla : 19293
+Description: move AT tunable parameters for more consistent usage
+Details : add AT tunables under /proc/sys/lustre, add to conf_param parsing
+
+Severity : enhancement
Bugzilla : 17974
Description: add lazystatfs mount option to allow statfs(2) to skip down OSTs
Details : allow skip disconnected ost for send statfs request and hide error