Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964886AbVITEmA (ORCPT ); Tue, 20 Sep 2005 00:42:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964887AbVITEmA (ORCPT ); Tue, 20 Sep 2005 00:42:00 -0400 Received: from e35.co.us.ibm.com ([32.97.110.133]:3470 "EHLO e35.co.us.ibm.com") by vger.kernel.org with ESMTP id S964886AbVITEmA (ORCPT ); Tue, 20 Sep 2005 00:42:00 -0400 Date: Tue, 20 Sep 2005 10:11:10 +0530 From: Srivatsa Vaddagiri To: Nigel Cunningham Cc: Nick Piggin , Ingo Molnar , Li Shaohua , Andrew Morton , Linus Torvalds , Zwane Mwaikambo , lkml , Rusty Russell Subject: Re: PATCH: Fix race in cpu_down (hotplug cpu) Message-ID: <20050920044110.GA19184@in.ibm.com> Reply-To: vatsa@in.ibm.com References: <20050919055715.GE8653@in.ibm.com> <1127110271.9696.97.camel@localhost> <20050919062336.GA9466@in.ibm.com> <1127111830.4087.3.camel@linux-hp.sh.intel.com> <1127111784.5272.10.camel@npiggin-nld.site> <1127113930.4087.6.camel@linux-hp.sh.intel.com> <1127114538.5272.16.camel@npiggin-nld.site> <20050919072842.GA11293@elte.hu> <1127115425.5272.21.camel@npiggin-nld.site> <1127170547.18737.3.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1127170547.18737.3.camel@localhost> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1025 Lines: 32 On Tue, Sep 20, 2005 at 08:55:47AM +1000, Nigel Cunningham wrote: > I got on the same page eventually :). When you have it ready, I'll be > happy to try it. Apart from trying another 75 suspends (which I'm happy > to do), I'm not really sure how we can be totally sure that the patch > fixes it. Do you have any thoughts in this regard? Since this seems to be related to CPU down event, you could run a tight loop like this overnight (for all CPUs in the system): while : do echo 0 > online echo 1 > online done This, maybe in conjunction with some other test like LTP or make -jN bzImage, is usually enough to capture all CPU-hotplug related problems. -- Thanks and Regards, Srivatsa Vaddagiri, Linux Technology Center, IBM Software Labs, Bangalore, INDIA - 560017 - 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/