This patchset is the second attempt to change nfsd to the kthread API. The main changes from the first patchset are: - it includes the patch by Neil Brown to take the BKL out of nfsd startup/shutdown codepath. This should hopefully plug the main race condition that could lead to oopses when nfsd was signaled and then rapidly restarted before all of the existing nfsd's had gone down. I've also added some comments to this patch to try and clarify the locking for future work. - It preserves signaling as the main method for taking down nfsd. While kthread_stop is easier to deal with and less racy than signals, a lot of distros do the equivalent of "pkill nfsd" to take nfsd down. Changing that would be painful. Also, using kthread_stop is slower than using signals, since taking down each thread would be serialized. - it removes the special handling where if the last thread caught a SIGHUP, the kernel would leave the export cache intact I've tested this by running I/O against the server w/ iozone while restarting nfs service in a loop. Everything seems to work as expected. As always, comments and suggestions are appreciated... Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> -- 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
