From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761290AbXJNF5y (ORCPT ); Sun, 14 Oct 2007 01:57:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760306AbXJNF5l (ORCPT ); Sun, 14 Oct 2007 01:57:41 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:51031 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753872AbXJNF5j (ORCPT ); Sun, 14 Oct 2007 01:57:39 -0400 Date: Sat, 13 Oct 2007 22:57:35 -0700 From: Paul Jackson To: Ingo Molnar , Srivatsa Vaddagiri , Dmitry Adamushko Cc: Andrew Morton , linux-kernel Subject: git-sched patch won't boot on SN arch, 2.6.23-mm1 Message-Id: <20071013225735.58c6415c.pj@sgi.com> Organization: SGI X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.3; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org The git-sched patch in 2.6.23-mm1 freezes my ia64 SN Altix hard on boot. Not good (tm). Something broke between the git-sched patch of Sept 26 in 2.6.23-rc8-mm2 and the git-sched patch of Oct 10 in 2.6.23-mm1 on my ia64 SN Altix system using sn2_defconfig. I can boot 2.6.23-rc8-mm2 fine, but I freeze early in boot on 2.6.23-mm1, after the following prints on the console: McKinley Errata 9 workaround not needed; disabling it SLUB: Genslabs=26, HWalign=128, Order=0-2, MinObjects=8, CPUs=8, Nodes=1024 Dentry cache hash table entries: 1048576 (order: 9, 8388608 bytes) Inode-cache hash table entries: 524288 (order: 8, 4194304 bytes) Mount-cache hash table entries: 1024 ACPI: Core revision 20070126 Boot processor id 0x0/0x0 Brought up 8 CPUs Total of 8 processors activated (15564.80 BogoMIPS). The next output that I -would- have expected, based on successful boots without this patch, but never get, is: net_namespace: 120 bytes DMI not present or invalid. xor: measuring software checksum speed ia64 : 2692.000 MB/sec xor: using function: ia64 (2692.000 MB/sec) NET: Registered protocol family 16 ACPI DSDT OEM Rev 0x20101 My .config has the following elements matching "SCHED" # CONFIG_FAIR_GROUP_SCHED is not set CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_AS=y CONFIG_IOSCHED_DEADLINE=y CONFIG_IOSCHED_CFQ=y CONFIG_DEFAULT_IOSCHED="anticipatory" CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y CONFIG_SCHED_SMT=y # CONFIG_NET_SCHED is not set # CONFIG_USB_EHCI_TT_NEWSCHED is not set CONFIG_SCHED_DEBUG=y # CONFIG_SCHEDSTATS is not set I'm pretty certain that I also saw this hang with the config setting: CONFIG_FAIR_GROUP_SCHED=y though there is a small chance I'm confused on that point. You'll probably need more information, but I can't guess what, so ask away. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401