From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422681AbWAMOUp (ORCPT ); Fri, 13 Jan 2006 09:20:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422689AbWAMOUp (ORCPT ); Fri, 13 Jan 2006 09:20:45 -0500 Received: from odin2.bull.net ([192.90.70.84]:54239 "EHLO odin2.bull.net") by vger.kernel.org with ESMTP id S1422681AbWAMOUo (ORCPT ); Fri, 13 Jan 2006 09:20:44 -0500 From: "Serge Noiraud" To: Ingo Molnar , linux-kernel@vger.kernel.org, Steven Rostedt Subject: RT question : softirq and minimal user RT priority Date: Fri, 13 Jan 2006 15:27:00 +0100 User-Agent: KMail/1.7.1 MIME-Version: 1.0 Message-Id: <200601131527.00828.Serge.Noiraud@bull.net> X-MIMETrack: Itemize by SMTP Server on MSGB-002/FR/BULL(Release 5.0.11 |July 24, 2002) at 01/13/2006 03:21:37 PM, Serialize by Router on MSGB-002/FR/BULL(Release 5.0.11 |July 24, 2002) at 01/13/2006 03:21:39 PM, Serialize complete at 01/13/2006 03:21:39 PM Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="iso-8859-15" Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, I was testing 2.6.15-rt3. During my tests, I tried to run a program which made a loop at RT priority 10 and 30. I was very happy to see that after the tests, I can't use any command except those already in memory. My filesystems were in read-only after the test. I was unable to shutdown the machine : top => command not found => INIT: cannot execute "/sbin/shutdown" /sbin/reboot => Input/Output error I had to push the reset button. My questions are : Did I find a bug ? Is the smallest usable real-time priority greater than the highest real-time softirq ? In this case could we forbid priority lesser than the highest softirq priority ?