Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751901Ab1CUGSh (ORCPT ); Mon, 21 Mar 2011 02:18:37 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:44030 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751699Ab1CUGSe convert rfc822-to-8bit (ORCPT ); Mon, 21 Mar 2011 02:18:34 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=rSkVK4/KrovpjwI2S0y/aA2hj6pvCR6+r+Jp2VGr3A50Od0i2Wo5iLgknx60A7xbSZ 857sRYmXAAsJUTQYlBOnzzMYzTtXgp3NCqDO5+VQq9pg5VOyc0SFGvd3yamWU3VONao4 JAUq/vEYPyg+vmDNwLnDKDqf6zrIg7b4BKqBQ= MIME-Version: 1.0 In-Reply-To: <20110321055413.GT22723@ZenIV.linux.org.uk> References: <20110321033926.GP22723@ZenIV.linux.org.uk> <20110321055413.GT22723@ZenIV.linux.org.uk> Date: Mon, 21 Mar 2011 09:18:33 +0300 Message-ID: Subject: Re: 2.6.39-rc0: umount tmpfs hangs From: Alexander Beregalov To: Al Viro Cc: Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1189 Lines: 25 On 21 March 2011 08:54, Al Viro wrote: > On Mon, Mar 21, 2011 at 08:30:23AM +0300, Alexander Beregalov wrote: > >> > rcu_barrier() hanging for some reason... ??I really wonder what's going >> > on there - missing rcu_read_unlock()? ??Could you try to reproduce that >> > sucker and, if possible, bisect it? >> >> Yes, it's reproducible, but I'm bisecting another issue and have few >> more such issues with the current kernel. > > Could you post the reproducer?  Simple mounting tmpfs and umount explicitly > doesn't seem to trigger it; doing some IO on that fs doesn't change that, > ditto for umount done by shutdown instead of doing it manually... For me it is just shutting down. While bisecting another issue I found this range for bisection: ceda86a108671294052cbf51660097b6534672f5 good 7a6362800cb7d1d618a697a650c7aaed3eb39320 bad but only if the bug is 100% reproducible with my test, I can't be sure yet. -- 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/