From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753602AbZFVWKn (ORCPT ); Mon, 22 Jun 2009 18:10:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751023AbZFVWKg (ORCPT ); Mon, 22 Jun 2009 18:10:36 -0400 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:57611 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750740AbZFVWKg (ORCPT ); Mon, 22 Jun 2009 18:10:36 -0400 Subject: Regression: ppc powerstation boot hang caused by slab initialisation code From: James Bottomley To: Pekka Enberg Cc: linux-kernel , "Rafael J. Wysocki" Content-Type: text/plain Date: Mon, 22 Jun 2009 17:10:35 -0500 Message-Id: <1245708635.17035.6.camel@mulgrave.site> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I'm getting a boot hang on my powerstation with recent kernels. It hangs in the early prom init code: Please wait, loading kernel... Elf64 kernel loaded... Loading ramdisk... ramdisk loaded at 02500000, size: 8280 Kbytes OF stdout device is: /ht/isa@8/serial@2f8 Preparing to boot Linux version 2.6.30 (jejb@claymoor) (gcc version 4.3.3 (Debian 4.3.3-10) ) #1 SMP Mon Jun 22 09:59:35 CDT 2009 command line: root=/dev/sda3 ro console=ttyS0,19200n1 memory layout at init: alloc_bottom : 0000000002d16000 alloc_top : 0000000030000000 alloc_top_hi : 0000000080000000 rmo_top : 0000000030000000 ram_top : 0000000080000000 instantiating rtas at 0x000000002fff5000... done boot cpu hw idx 0000000000000000 starting cpu hw idx 0000000000000001... done starting cpu hw idx 0000000000000002... done starting cpu hw idx 0000000000000003... done copying OF device tree... Building dt strings... Building dt structure... Device tree strings 0x0000000003117000 -> 0x0000000003117640 Device tree struct 0x0000000003118000 -> 0x000000000311b000 Calling quiesce... returning from prom_init Git bisect identifies this commit: commit 83b519e8b9572c319c8e0c615ee5dd7272856090 Author: Pekka Enberg Date: Wed Jun 10 19:40:04 2009 +0300 slab: setup allocators earlier in the boot sequence So it's something do do with early slab initialisation. I'll try to track it down, but reverting it is hard because it seems to have a chain of dependent commits. James