From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756191AbZANSm7 (ORCPT ); Wed, 14 Jan 2009 13:42:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753859AbZANSml (ORCPT ); Wed, 14 Jan 2009 13:42:41 -0500 Received: from sj-iport-6.cisco.com ([171.71.176.117]:37092 "EHLO sj-iport-6.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756067AbZANSmh (ORCPT ); Wed, 14 Jan 2009 13:42:37 -0500 X-IronPort-AV: E=Sophos;i="4.37,263,1231113600"; d="scan'208";a="229842603" From: Roland Dreier To: linux-kernel@vger.kernel.org Subject: CPA warning when running dmidecode on 2.6.29-rc1 X-Message-Flag: Warning: May contain useful information Date: Wed, 14 Jan 2009 10:42:36 -0800 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 14 Jan 2009 18:42:37.0087 (UTC) FILETIME=[DEF9D2F0:01C97677] Authentication-Results: sj-dkim-4; header.From=rdreier@cisco.com; dkim=pass ( sig from cisco.com/sjdkim4002 verified; ); Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I just got the following when trying to dmidecode on a system running 2.6.29-rc1-git... STRICT_DEVMEM isn't set. Let me know if any further info would be helpful... [72673.717016] ------------[ cut here ]------------ [72673.721697] WARNING: at /scratch/Ksrc/linux-git/arch/x86/mm/pageattr.c:560 __change_page_attr_set_clr+0xe2/0x867() [72673.732061] Hardware name: PowerEdge SC1435 [72673.736260] CPA: called for zero pte. vaddr = ffff8800dffbc000 cpa->vaddr = ffff8800dffbc000 [72673.744710] Modules linked in: tun nfs lockd nfs_acl auth_rpcgss sunrpc ipv6 bridge stp llc dm_snapshot dm_mirror dm_region_hash dm_log dm_mod kvm_amd kvm loop evdev ib_mthca thermal serio_raw psmouse pcspkr ib_mad ib_core ohci_hcd ehci_hcd tg3 libphy processor dcdbas [72673.769213] Pid: 2622, comm: dmidecode Not tainted 2.6.29-rc1 #38 [72673.775329] Call Trace: [72673.777802] [] warn_slowpath+0xd8/0x112 [72673.783310] [] __alloc_pages_internal+0xd2/0x40e [72673.789596] [] do_get_write_access+0x3c6/0x408 [72673.795705] [] zone_statistics+0x3c/0x5f [72673.801292] [] __change_page_attr_set_clr+0xe2/0x867 [72673.807916] [] __purge_vmap_area_lazy+0x146/0x155 [72673.814274] [] vm_unmap_aliases+0x16f/0x180 [72673.820107] [] change_page_attr_set_clr+0x14b/0x2fa [72673.826643] [] _set_memory_wb+0x1d/0x20 [72673.832136] [] reserve_pfn_range+0x1a2/0x233 [72673.838066] [] remap_pfn_range+0x8f/0x342 [72673.843732] [] reserve_memtype+0x193/0x4cd [72673.849480] [] phys_mem_access_prot_allowed+0xb4/0x1aa [72673.856275] [] mmap_mem+0x6c/0x91 [72673.861249] [] mmap_region+0x2e0/0x57d [72673.866657] [] do_mmap_pgoff+0x28c/0x2f3 [72673.872240] [] sys_mmap+0x8c/0xc5 [72673.877212] [] system_call_fastpath+0x16/0x1b [72673.883227] ---[ end trace 592fdf59445922ef ]--- [72673.887864] dmidecode:2622 reserve_pfn_range ioremap_change_attr failed write-back for dffbc000-dffbd000 [72673.897346] dmidecode:2622 freeing invalid memtype dffbc000-dffbd000