On Wed, Feb 11, 2009 at 03:35:55PM -0500, J. Bruce Fields wrote: > On Wed, Feb 11, 2009 at 12:23:18PM +0100, Frank van Maarseveen wrote: > > I'm sorry to inform you but... it seems that there is a similar problem > > in the NLM subsystem as reported previously but this time it is triggered > > when the grace time expires after a reboot. > > > > Client and server run 2.6.27.14 + previous fix, NFSv3. > > > > On the client there are three shells running: > > > > while :; do lck -w /mnt/foo 2; done > > > > The "lck" program is the same as posted before and it obtains an exclusive > > write lock then waits 2 seconds in above invocation (there's probably an > > "fcntl" command equivalent). After an orderly server reboot + grace time > > How are you rebooting the server? "reboot" > > --b. > > > expiration one of above command loops reports: > > > > lck: fcntl: No locks available > > > > and all three get stuck. After ^C-ing all "lck" loops the server still > > shows an entry in /proc/locks which causes the file to be locked > > indefinately. Maybe two loops are sufficient to reproduce the issue or > > maybe you need more, I don't know. > > > > Interestingly, during the grace time at least one of the "lck" processes > > should have re-obtained the lock but it didn't show up in /proc/locks > > on the server. > > > > Interestingly (#2), after removing the file on the server (i.e. no > > sillyrename) the now free inode is still locked according to /proc/locks. > > Even stopping/starting /etc/init.d/nfs-kernel-server plus "echo > > 3 >/proc/sys/vm/drop_caches" did not remove the lock (it did re-enter > > grace). > > > > -- > > Frank > > -- > > 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 -- Frank -- 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
