Return-Path: linux-nfs-owner@vger.kernel.org Received: from icebox.esperi.org.uk ([81.187.191.129]:47824 "EHLO mail.esperi.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754033AbbBKXLj (ORCPT ); Wed, 11 Feb 2015 18:11:39 -0500 From: Nix To: NeilBrown Cc: bfields@fieldses.org (J. Bruce Fields), NFS list Subject: Re: what on earth is going on here? paths above mountpoints turn into "(unreachable)" References: <87iofju9ht.fsf@spindle.srvr.nix> <20150203195333.GQ22301@fieldses.org> <87egq6lqdj.fsf@spindle.srvr.nix> <87r3u58df2.fsf@spindle.srvr.nix> <20150205112641.60340f71@notabene.brown> <87zj8l7j3z.fsf@spindle.srvr.nix> <20150211140714.4da42a5b@notabene.brown> Date: Wed, 11 Feb 2015 23:11:33 +0000 In-Reply-To: <20150211140714.4da42a5b@notabene.brown> (NeilBrown's message of "Wed, 11 Feb 2015 14:07:14 +1100") Message-ID: <87pp9gujq2.fsf@spindle.srvr.nix> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-nfs-owner@vger.kernel.org List-ID: On 11 Feb 2015, NeilBrown spake thusly: > I wonder if something is going wrong in nfs_prime_dcache(). The code looks > right, but it is a little complex... > > You could rule that out by disabling READDIRPLUS by using the nordirplus > mount option. If that makes the proble go away, it would be very > interesting... > > A more intrusive debugging approach would be to get d_drop() to scream if the > dentry being dropped had DCACHE_MOUNTED set. > > Are you able to try either of those? I'll test both (the former first). The problem's still happening several times a day, so I should be able to get back to you fairly fast... -- NULL && (void)