Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755689Ab0DVCwX (ORCPT ); Wed, 21 Apr 2010 22:52:23 -0400 Received: from mail-wy0-f174.google.com ([74.125.82.174]:32856 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754258Ab0DVCwV (ORCPT ); Wed, 21 Apr 2010 22:52:21 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=NF4Q2Oxgg72E7epZKBaIjY086ZNVwYoCfTtJi3R8/Vlk1pCXt+clkAnmUejaVm6fdU s0UVdDT+ce5qmYIifr/TdvBiwiAnhi1Abz+5JLgKCp0imnVKXsDcgZxZhUdcEbNAQVW6 qeQcFAtH1djnJh0ZEGpW+08NiM5xdkaOWmAUw= Date: Thu, 22 Apr 2010 04:52:27 +0200 From: Frederic Weisbecker To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Alexander Beregalov , Jeff Mahoney , Andrew Morton Subject: Re: [Bug #15805] reiserfs locking Message-ID: <20100422025224.GA12888@nowhere> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1395 Lines: 40 On Tue, Apr 20, 2010 at 05:19:25AM +0200, Rafael J. Wysocki wrote: > This message has been generated automatically as a part of a summary report > of recent regressions. > > The following bug entry is on the current list of known regressions > from 2.6.33. Please verify if it still should be listed and let the tracking team > know (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=15805 > Subject : reiserfs locking > Submitter : Alexander Beregalov > Date : 2010-04-15 21:02 (5 days old) > Message-ID : > References : http://marc.info/?l=linux-kernel&m=127136535323933&w=2 That doesn't look like related to the bkl removal. In fact what I wonder is how we missed that before. vfs_readdir() take the directory inode mutex | ------- copy_to_user() takes the mm->mmap_sem sys_unmap() takes mm->mmap_sem | ------- reiserfs_file_release() takes inode mutex The lock inversion can not happen as sys_getdents() can't be called after the directory is closed. I'm not sure what to do. Adding more people in Cc. -- 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/