Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756782AbYBFRzo (ORCPT ); Wed, 6 Feb 2008 12:55:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754267AbYBFRzh (ORCPT ); Wed, 6 Feb 2008 12:55:37 -0500 Received: from hobbit.corpit.ru ([81.13.94.6]:23765 "EHLO hobbit.corpit.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754030AbYBFRzg (ORCPT ); Wed, 6 Feb 2008 12:55:36 -0500 Message-ID: <47A9F495.8060400@msgid.tls.msk.ru> Date: Wed, 06 Feb 2008 20:55:33 +0300 From: Michael Tokarev User-Agent: Icedove 1.5.0.12 (X11/20070607) MIME-Version: 1.0 To: Kernel Mailing List Subject: remount-ro & umount & quota interaction X-Enigmail-Version: 0.94.2.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1770 Lines: 42 For a long time I'm bitten by a bad interaction of mount -o remount,ro and quota operations. The sequence is as follows: mount /fs quotaon -ug /fs mount -o remount,ro /fs umount /fs At this point, umount never returns. /proc/$pid/wchan shows vfs_quota_off: Feb 6 20:53:25 linux kernel: umount D e5183eb8 0 8646 1 Feb 6 20:53:25 linux kernel: e5183ecc 00000086 00000002 e5183eb8 e5183eb0 00000000 c1db2540 c1db2684 Feb 6 20:53:25 linux kernel: c1db2684 c1c0dd00 00000000 cfd9f1c0 c0367080 c0367080 f5849000 f7f06880 Feb 6 20:53:25 linux kernel: f7e89d80 00000000 c0367080 b7c9795c 005f3997 00000000 000000ff 00000000 Feb 6 20:53:25 linux kernel: Call Trace: Feb 6 20:53:25 linux kernel: [] vfs_quota_off+0x345/0x490 Feb 6 20:53:25 linux kernel: [] autoremove_wake_function+0x0/0x50 Feb 6 20:53:25 linux kernel: [] deactivate_super+0x46/0x80 Feb 6 20:53:25 linux kernel: [] sys_umount+0x4a/0x240 Feb 6 20:53:25 linux kernel: [] sys_stat64+0xf/0x30 Feb 6 20:53:25 linux kernel: [] remove_vma+0x39/0x50 Feb 6 20:53:25 linux kernel: [] do_munmap+0x197/0x1f0 Feb 6 20:53:25 linux kernel: [] sys_oldumount+0x15/0x20 Feb 6 20:53:25 linux kernel: [] sysenter_past_esp+0x5f/0x85 The filesystem is ext3. The issue is here for a long time, at least since before 2.6.20, and is still present in 2.6.23 (I'll try 2.6.24 later today). Can it be fixed please? :) Thanks! /mjt -- 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/