Hello, After updating our kernel from 3.4.x to 3.14.27 (along with nfs-utils 1.2.9), we've had a strange issue with our sec=krb5p NFSv4 mounts. My initial light testing went fine, but sometimes, on any given host, a specific file will no longer be accessible. Any attempt to access it causes the process to go into uninterruptible sleep. Reproducing this on another host was fairly quick by dd'ing 30MB from /dev/zero into a file repeatedly. Eventually the dd hangs instead of completing. Once broken, the simplest test I could think of was "stat testfile". tcpdump shows no traffic when I run it. Turning rpcdebug all the way up produces: kernel: RPC: looking up Generic cred kernel: NFS: permission(0:28/3), mask=0x1, res=0 kernel: NFS: nfs_lookup_revalidate(/testfile) is valid Around the time that it breaks, it also prints kernel: nfs: server servername not responding, still trying several times, but I couldn't find a way to get it to print it again. It doesn't look like it follows up with more timeouts or an "OK", so that seems pretty odd. Anyone have any ideas? I'm happy to provide more debug info. Thanks, Brian -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
