From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265237AbUGXNuK (ORCPT ); Sat, 24 Jul 2004 09:50:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268604AbUGXNuK (ORCPT ); Sat, 24 Jul 2004 09:50:10 -0400 Received: from main.gmane.org ([80.91.224.249]:25774 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S265237AbUGXNuF (ORCPT ); Sat, 24 Jul 2004 09:50:05 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Marc Ballarin Subject: Re: Interesting race condition... Date: Sat, 24 Jul 2004 13:40:59 +0000 (UTC) Message-ID: References: <200407222204.46799.rob@landley.net> <20040723073300.GA4502@ip68-4-98-123.oc.oc.cox.net> <200407240313.19053.rob@landley.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: main.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 80.139.250.169 (Mozilla/5.0 (compatible; Konqueror/3.2; Linux) (KHTML, like Gecko)) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Rob Landley landley.net> writes: > Oh I can't reproduce it either. (Maybe if I set some kind of loop and left > it running for a few days...) I could reproduce it on an otherwise idle system (2 GHz Athlon, kernel 2.6.7). On a loaded system the bug did not occur, which certainly indicates a race condition. Using the following Bash script, the bug appeared 23 times in 122,221 iterations: while [ 1 ];do ps ax | grep hack >> TEST done The bug *seems* to be in bash, since an equivalent script in tcsh had no problems: while ( 1 ) ps ax | grep hack >> TEST2 end This issue has the potential to break a lot of shell scripts in an almost undebugable way. Should someone file a bug report via 'bashbug'? Marc