Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750781AbWJGKYd (ORCPT ); Sat, 7 Oct 2006 06:24:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750786AbWJGKYd (ORCPT ); Sat, 7 Oct 2006 06:24:33 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:23709 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S1750781AbWJGKYc (ORCPT ); Sat, 7 Oct 2006 06:24:32 -0400 Date: Sat, 7 Oct 2006 12:24:19 +0200 From: Pavel Machek To: Andrew Morton Cc: Bryce Harrington , vatsa@in.ibm.com, torvalds@osdl.org, linux-kernel@vger.kernel.org, shaohua.li@intel.com, hotplug_sig@osdl.org, lhcs-devel@lists.sourceforge.net Subject: Re: Status on CPU hotplug issues Message-ID: <20061007102419.GB30034@elf.ucw.cz> References: <20060316174447.GA8184@in.ibm.com> <20060316170814.02fa55a1.akpm@osdl.org> <20060317084653.GA4515@in.ibm.com> <20060317010412.3243364c.akpm@osdl.org> <20061006231012.GH22139@osdl.org> <20061006162924.344090f8.akpm@osdl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061006162924.344090f8.akpm@osdl.org> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1959 Lines: 45 Hi! > > > How well tested is this? From my reading, this will cause > > > enable_nonboot_cpus() to panic. Is that intended? > > > > I wanted to give you an update on results of cpu testing I've done on > > recent kernels and several architectures. Since -rc1 is out, I wanted > > to give added visibility to the few issues that remain. > > > > The full results are available here: > > > > http://crucible.osdl.org/runs/hotplug_report.html > > > > This is actually a report for cpu hotplug tests generated hourly, > > however we run it against all of the kernel -git snapshots posted to > > kernel.org. Whereever you see a blank square, it indicates the kernel > > either failed to build or boot. So... patch-2.6.18-git4 failed to boot on all architectures? I'm seeing very little green fields there... actually I only see two green fields in whole table. (And it would be nice to call ia64 "ia64", not "ita64" :-) > Can you describe the nature of the cpu-hotplug tests you're running? I'd > be fairly staggered if the kernel was able to survive a full-on cpu-hotplug > stress test for more than one second, frankly. There's a lot of code in > there which is non-hotplug-aware. Running a non-preemptible kernel would > make things appear more stable, perhaps. > > iirc Pavel did some testing a month or two ago and was seeing userspace > misbehaviour? Pavel did some testing (like two threads trying to plug/unplug cpus at the same time), and seen machines dying real fast; but that was fixed, IIRC, and I did not really torture it after that. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/