K 10 svn:author V 8 rmacklem K 8 svn:date V 27 2010-04-18T22:21:23.169351Z K 7 svn:log V 591 Avoid extraneous recovery cycles in the experimental NFS client when an NFSv4 server reboots, by doing two things. 1 - Make the function that acquires a stateid for I/O operations block until recovery is complete, so that it doesn't acquire out of date stateids. 2 - Only allow a recovery once every 1/2 of a lease duration, since the NFSv4 server must provide a recovery grace period of at least a lease duration. This should avoid recoveries caused by an out of date stateid that was acquired for an I/O op. just before a recovery cycle started. MFC after: 1 week END