Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755338AbZDNHrW (ORCPT ); Tue, 14 Apr 2009 03:47:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752171AbZDNHrK (ORCPT ); Tue, 14 Apr 2009 03:47:10 -0400 Received: from hera.kernel.org ([140.211.167.34]:37730 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751912AbZDNHrI (ORCPT ); Tue, 14 Apr 2009 03:47:08 -0400 Message-ID: <49E43F1D.3070400@kernel.org> Date: Tue, 14 Apr 2009 16:45:33 +0900 From: Tejun Heo User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: "Eric W. Biederman" CC: Andrew Morton , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Al Viro , Hugh Dickins , Alexey Dobriyan , Linus Torvalds , Alan Cox , Greg Kroah-Hartman Subject: Re: [RFC][PATCH 0/9] File descriptor hot-unplug support References: <49E4000E.10308@kernel.org> In-Reply-To: X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Tue, 14 Apr 2009 07:45:37 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 805 Lines: 24 Eric W. Biederman wrote: > Do you know of a case where we actually have multiple tasks accessing > a file simultaneously? I don't have anything at hand but multithread/process server accepting on the same socket comes to mind. I don't think it would be a very rare thing. If you confine the scope to character devices or sysfs, it could be quite rare tho. > I just instrumented up my patch an so far the only case I have found > are multiple processes closing the same file. Some weird part of > bash forking extra processes. Hmmm... Thanks. -- tejun -- 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/