Dear Chaps, I am experiencing some inexplicable NFS behaviour which I would like to run past you. I have a linux NFS server running kernel 3.10.2 and some clients running the same. The server is actually a pair of identical machines serving up a small number of ext4 filesystems atop drbd. They don't do much apart from serve home directories and deliver mail into them. These have worked just fine for aeons. The problem I am seeing is that for the past month or so, on and off, one NFS client starts reporting stale NFS file handles on some part of the directory tree exported by the NFS server. During the outage the other parts of the same export remain unaffected. Then, some ten minutes to an hour later they're back to normal. Access to the affected sub-directories remains possible from the server (both directly and via nfs) and from other clients. There do not appear to be any errors on the underlying ext4 filesystems. Each NFS client seems to get the heebie-jeebies over some directory or other pretty much independently. The problem affects all of the filesystems exported by the NFS server, but clearly I notice it first in home directories, and in particular in my dot subdirectories for things like my mail client and browser. I'd say something's up the spout about 20% of the time. The server and clients are using nfs4, although for a while I tried nfs3 without any appreciable difference. I do not have CONFIG_FSCACHE set. I wonder if anyone could tell me if they have ever come across this before, or what debugging settings might help me diagnose the problem? Yours, Larry -- 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
