Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753510Ab3CUV0W (ORCPT ); Thu, 21 Mar 2013 17:26:22 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:38163 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932082Ab3CUV0T (ORCPT ); Thu, 21 Mar 2013 17:26:19 -0400 Date: Thu, 21 Mar 2013 21:26:17 +0000 From: Al Viro To: Linus Torvalds Cc: Dave Jones , Linux Kernel Subject: Re: VFS deadlock ? Message-ID: <20130321212617.GA21522@ZenIV.linux.org.uk> References: <20130321190653.GA15479@redhat.com> <20130321192935.GY21522@ZenIV.linux.org.uk> <20130321202635.GA16406@redhat.com> <20130321203639.GC16406@redhat.com> <20130321204704.GZ21522@ZenIV.linux.org.uk> <20130321210255.GD16406@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1337 Lines: 32 On Thu, Mar 21, 2013 at 02:18:15PM -0700, Linus Torvalds wrote: > On Thu, Mar 21, 2013 at 2:02 PM, Dave Jones wrote: > > > > here we go... > > > > WARNING: at fs/namei.c:2335 lock_rename+0x156/0x160() > > p1=irda p2=irda > > Ok, good. I ssupect it's /proc or /sys, we do have that entry there. > > But in fact I suspect we do want the parent name after all, because I > think we have multiple "irda" directories. There's the one in > /proc/net/ (added by net/irda/irproc.c), and there's a sysctl CTL_DIR > "irda" directory (kernel/sysctl_binary.c). And there might even be a > few other ones in /sys too, thanks to the ldisc called "irda" etc. > > I don't see where the shared inode comes from, but I suspect that > would be easier to guess if we actually see which particular case it > ends up being.. Well, something like static char path[4096]; d_absolute_path(p1, path, 4096); printk(KERN_ERR "%s %s %d %d" path, p1->d_sb->s_type->name, d_unlinked(p1), d_unlinked(p2)); might be useful - pathname within fs, fs type and which of those suckers are unlinked... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/