From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932544AbWF2U5J (ORCPT ); Thu, 29 Jun 2006 16:57:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932543AbWF2U5J (ORCPT ); Thu, 29 Jun 2006 16:57:09 -0400 Received: from smtp.osdl.org ([65.172.181.4]:32673 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932544AbWF2U5G (ORCPT ); Thu, 29 Jun 2006 16:57:06 -0400 Date: Thu, 29 Jun 2006 14:00:24 -0700 From: Andrew Morton To: Ralf Hildebrandt Cc: helge.hafting@aitel.hist.no, linux-kernel@vger.kernel.org Subject: Re: 2.6.17-mm one process gets stuck in infinite loop in the kernel. Message-Id: <20060629140024.57d94629.akpm@osdl.org> In-Reply-To: <20060629203942.GE20456@charite.de> References: <20060629013643.4b47e8bd.akpm@osdl.org> <44A3B8A0.4070601@aitel.hist.no> <20060629104117.e96df3da.akpm@osdl.org> <20060629203942.GE20456@charite.de> X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; i386-vine-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ralf Hildebrandt wrote: > > * Andrew Morton : > > > > I have seen this both with mm2, m33 and mm4. > > > Suddenly, the load meter jumps. > > > Using ps & top, I see one process using 100% cpu. > > > This is always a process that was exiting, this tend to happen > > > when I close applications, or doing debian upgrades which > > > runs lots of short-lived processes. > > > > > > I believe it is running in the kernel, ps lists it with stat "RN" > > > and it cannot be killed, not even with kill -9 from root. > > I see exactly the same here. > > > Please generate a kernel profile when it happens so we can see > > where it got stuck. > > Do I need to compile the kernel with profiling for this:> Nope. > > > to work? And is "profile=1" a boot parameter? Yes, profile=1 is a boot parameter.