Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751325AbXANPmp (ORCPT ); Sun, 14 Jan 2007 10:42:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751322AbXANPmp (ORCPT ); Sun, 14 Jan 2007 10:42:45 -0500 Received: from mx1.redhat.com ([66.187.233.31]:50448 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751321AbXANPmo (ORCPT ); Sun, 14 Jan 2007 10:42:44 -0500 Message-ID: <45AA4F4D.5030605@redhat.com> Date: Sun, 14 Jan 2007 09:42:05 -0600 From: Eric Sandeen User-Agent: Thunderbird 1.5.0.9 (Macintosh/20061207) MIME-Version: 1.0 To: Dmitriy Monakhov CC: Linux Kernel Mailing List , ext4 development Subject: Re: [PATCH] [RFC] remove ext3 inode from orphan list when link and unlink race References: <45A7F384.3050303@redhat.com> <878xg5q0q7.fsf@sw.ru> In-Reply-To: <878xg5q0q7.fsf@sw.ru> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1313 Lines: 39 Dmitriy Monakhov wrote: > Eric Sandeen writes: > >> I've been looking at a case where many threads are opening, unlinking, and >> hardlinking files on ext3 . > How many concurent threads do you use and how long does it takes to trigger > this race? I've tried to reproduce this with two threads, but not succeed. > > fd = create("src") > close(fd) > unlink("src") > > link("src", "dst") > unlink("dst") > > Original testcase will be the best answer :). Sure :) Though I didn't write it... see this collection of bash scripts: http://people.redhat.com/esandeen/testcases/orphan-repro.tar.bz2 I didn't write it, but it exposed the bug for me. The VAR file contains variables to specify mountpoint and a device, which the script starts by mkfs'ing, so be warned. It spawns -many- threads, and on my 4 CPU opteron I can hit it in a reasonable amount of time. It would probably be nice to have a more targeted testcase but it did the trick for me. Thanks, -Eric > Thanks. - 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/