From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 3 Mar 2008 17:30:11 -0800 From: Andrew Morton Subject: Re: [PATCH 2/2] x86_64: Cleanup non-smp usage of cpu maps v3 Message-Id: <20080303173011.b0d9a89d.akpm@linux-foundation.org> In-Reply-To: <20080303170235.4334e841.akpm@linux-foundation.org> References: <20080219203335.866324000@polaris-admin.engr.sgi.com> <20080219203336.177905000@polaris-admin.engr.sgi.com> <20080303170235.4334e841.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: travis@sgi.com, mingo@elte.hu, tglx@linutronix.de, ak@suse.de, clameter@sgi.com, steiner@sgi.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: On Mon, 3 Mar 2008 17:02:35 -0800 Andrew Morton wrote: > I was unable to bisect it more finely than this: > > init-move-setup-of-nr_cpu_ids-to-as-early-as-possible-v3.patch > generic-percpu-infrastructure-to-rebase-the-per-cpu-area-to-zero-v3.patch OK > x86_64-fold-pda-into-per-cpu-area-v3.patch > x86_64-fold-pda-into-per-cpu-area-v3-fix.patch > x86_64-cleanup-non-smp-usage-of-cpu-maps-v3.patch BAD > > because when x86_64-cleanup-non-smp-usage-of-cpu-maps-v3.patch was removed > the machine hung quite early, when playing around with TSC calibration I > think. This just happened again with the patches dropped, so it is a separate bug - just another regression. I now recall that it has been happening on every fifth-odd boot for a few weeks now. The machine prints Time: tsc clocksource has been installed then five instances of "system 00:01: iomem range 0x...", then it hangs. ie: it never prints "system 00:01: iomem range 0xfe600000-0xfe6fffff has been reserved" from http://userweb.kernel.org/~akpm/dmesg-akpm2.txt. It may have some correlation with whether the machine was booted via poweron versus `reboot -f', dunno. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org