Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261287AbVECBcu (ORCPT ); Mon, 2 May 2005 21:32:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261283AbVECBcK (ORCPT ); Mon, 2 May 2005 21:32:10 -0400 Received: from 70-57-132-14.albq.qwest.net ([70.57.132.14]:28302 "EHLO montezuma.fsmlabs.com") by vger.kernel.org with ESMTP id S261287AbVECBbr (ORCPT ); Mon, 2 May 2005 21:31:47 -0400 Date: Mon, 2 May 2005 19:33:42 -0600 (MDT) From: Zwane Mwaikambo To: Lee Revell cc: Benjamin Herrenschmidt , Juergen Kreileder , Andrew Morton , Oleg Nesterov , linux-kernel@vger.kernel.org, maneesh@in.ibm.com Subject: Re: [PATCH] fix __mod_timer vs __run_timers deadlock. In-Reply-To: <1115083453.27658.6.camel@mindpipe> Message-ID: References: <42748B75.D6CBF829@tv-sign.ru> <20050501023149.6908c573.akpm@osdl.org> <87vf61kztb.fsf@blackdown.de> <1115079230.6155.35.camel@gaston> <1115083453.27658.6.camel@mindpipe> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1242 Lines: 25 On Mon, 2 May 2005, Lee Revell wrote: > On Tue, 2005-05-03 at 10:13 +1000, Benjamin Herrenschmidt wrote: > > Well, there may be other issues brought by this new timer code though. > > I'm running G5s regulary without a lockup or anything for weeks, so it > > would be interesting if you could try to find out what's involved in > > that other lockup you had. > > It seems like it would not be to hard to create a timer test suite that > just hammers the timer subsystem, creating and deleting and modifying > zillions of timers, changing the system time, etc. Combined with > running with HZ=10000 or something it seems like you could shake out > bugs a lot faster than just running & waiting for a race to show up. > > I've seen timer related issues (the set_rtc_mmss issue that George > Anzinger fixed) while testing the RT patchset that I could only ever > reproduce once. Heavy networking load should do it, something like volanomark actually does quite a decent job of stressing timers. - 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/