Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755478AbYHXRp6 (ORCPT ); Sun, 24 Aug 2008 13:45:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752217AbYHXRpu (ORCPT ); Sun, 24 Aug 2008 13:45:50 -0400 Received: from py-out-1112.google.com ([64.233.166.183]:28836 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752062AbYHXRpt (ORCPT ); Sun, 24 Aug 2008 13:45:49 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=eVHHfHvxX5WgMmNzhBSOzGhQoLIRVxkWsrV1LjYwLaBaMQjsObJTR/h0oB0+UKen4w w49YC1qcE7nMG8e8H2Oi7Zp9HSgAflOc+2NhjxFwyKO19g+0oSSx+KZ++i1B8tDmnVzf 1YJH3wH+Q8CNIGgTL+MjycTxvJVDekwIhvO/8= Message-ID: <19f34abd0808241045r37eb8661h3cc688b6f0513777@mail.gmail.com> Date: Sun, 24 Aug 2008 19:45:48 +0200 From: "Vegard Nossum" To: "H. Peter Anvin" Subject: Re: latest -git: WARNING: at arch/x86/kernel/ipi.c:123 send_IPI_mask_bitmask+0xc3/0xe0() Cc: "Dave Jones" , "Andi Kleen" , "the arch/x86 maintainers" , "Linux Kernel Mailing List" , "Rusty Russell" In-Reply-To: <19f34abd0808241022j1ab6f3e6qd72b9acba5df4892@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <19f34abd0808191251x4eb61c50n13ecf7c90f0f3d9f@mail.gmail.com> <20080820013930.GN9807@one.firstfloor.org> <19f34abd0808192326jc10e758m99e76bbd5714c5b8@mail.gmail.com> <20080822003659.GA7581@redhat.com> <48AE20B8.9000204@kernel.org> <19f34abd0808240220v77bcdd5di32f8f865b18fc49f@mail.gmail.com> <48B19799.6090703@kernel.org> <19f34abd0808241022j1ab6f3e6qd72b9acba5df4892@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1957 Lines: 59 On Sun, Aug 24, 2008 at 7:22 PM, Vegard Nossum wrote: >>> Kernel fails to detect cpu1 at all. > I'm sorry, I _just_ reverted your patch and tested the bare kernel... > but it still only detects cpu0 :-( > > Apart from that, it's also incredibly slow and I get some > "end_request: I/O error, dev fd0, sector 0" messages. Start-up (init 3 > on a F7) takes closer to 10 minutes. Will now take a closer look at my > config. > > Oh. I _just_ noticed a completely different change -- I added acpi=off > to my boot line *blush* Removing acpi=off helps with the CPU detection problem. The kernel is still really slow, though. From /proc/cpuinfo: processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Intel(R) Pentium(R) 4 CPU 3.00GHz stepping : 5 cpu MHz : 375.000 cache size : 2048 KB Why is MHz on 375!? I tried cpufreq-selector, but nothing changed. Maybe calling acpi_cpufreq_init+0x0/0x90 initcall acpi_cpufreq_init+0x0/0x90 returned -19 after 0 msecs There's also this: SMP: Allowing 2 CPUs, 0 hotplug CPUs (but CPU hotplug still work, is the line above about something different, like physical hotplug?) Apart from that, with your patch applied, hotplug seems to work OK (no warnings). Okay, now I used cpufreq-selector to change to "ondemand" governor, and MHz goes back to 3000. Weird. Why would "performance" governor put my machine to a constant 375? Thanks, Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036 -- 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/