Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752083AbdIMNIQ (ORCPT ); Wed, 13 Sep 2017 09:08:16 -0400 Received: from er-systems.de ([148.251.68.21]:47690 "EHLO er-systems.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751623AbdIMNIL (ORCPT ); Wed, 13 Sep 2017 09:08:11 -0400 X-Greylist: delayed 523 seconds by postgrey-1.27 at vger.kernel.org; Wed, 13 Sep 2017 09:08:11 EDT Date: Wed, 13 Sep 2017 14:59:23 +0200 (CEST) From: Thomas Voegtle X-X-Sender: thomas@er-systems.de To: Andy Lutomirski cc: Paul Menzel , X86 ML , "linux-kernel@vger.kernel.org" Subject: Re: WARNING: CPU: 1 PID: 0 at arch/x86/mm/tlb.c:237 initialize_tlbstate_and_flush+0x120/0x130 In-Reply-To: Message-ID: References: <207325281bb02ccd9a230ea38255de08@molgen.mpg.de> User-Agent: Alpine 2.20 (LSU 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed X-Virus-Checker-Version: clamassassin 1.2.4 with clamdscan / ClamAV 0.99.2/23822/Wed Sep 13 10:37:32 2017 signatures . Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2456 Lines: 68 On Sun, 10 Sep 2017, Andy Lutomirski wrote: > On Sat, Sep 9, 2017 at 11:48 PM, Paul Menzel wrote: >> Dear Linux folks, >> >> >> With Linux built from commit 4dfc2788033d (Merge tag 'iommu-updates-v4.14' >> of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu), I get the >> warning below on a Lenovo X60t with a 32-bit CPU. > > Indeed. I sent a patch this morning. The warning is harmless -- the > warning condition has a typo. I get that warning (4 times) with that typo fix: [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/x86/mm/tlb.c:245 initialize_tlbstate_and_flush+0x6e/0xf0 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.13.0-i5-11559-g6d8ef53e8b2f #176 [ 0.000000] Hardware name: BIOSTAR Group H81MG/H81MG, BIOS 4.6.5 06/27/2014 [ 0.000000] task: ffffffff8680e480 task.stack: ffffffff86800000 [ 0.000000] RIP: 0010:initialize_tlbstate_and_flush+0x6e/0xf0 [ 0.000000] RSP: 0000:ffffffff86803e60 EFLAGS: 00010046 [ 0.000000] RAX: ffffffff8682c1c0 RBX: 0000000000000000 RCX: 0000000062809000 [ 0.000000] RDX: 00000000000406b0 RSI: 0000000006809000 RDI: 0000000000000000 [ 0.000000] RBP: ffffffff86803e60 R08: 0000000062809000 R09: ffffffff8697b800 [ 0.000000] R10: 0000ffffffffffff R11: ffffffff0000ffff R12: ffff8d7b00a16380 [ 0.000000] R13: 0000000000000000 R14: ffff8d7b00a0c3a0 R15: ffffffff8680e480 [ 0.000000] FS: 0000000000000000(0000) GS:ffff8d7b00a00000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffff8d7b00dff000 CR3: 0000000062809000 CR4: 00000000000406b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 0.000000] Call Trace: [ 0.000000] cpu_init+0x1bd/0x4a0 [ 0.000000] trap_init+0x3e/0x50 [ 0.000000] start_kernel+0x2ad/0x3fc [ 0.000000] ? set_init_arg+0x55/0x55 [ 0.000000] x86_64_start_reservations+0x24/0x26 [ 0.000000] x86_64_start_kernel+0x6f/0x72 [ 0.000000] secondary_startup_64+0xa5/0xa5 [ 0.000000] Code: 48 01 f2 49 39 d0 0f 85 94 00 00 00 48 8b 15 be f6 84 00 f7 c2 00 00 02 00 74 12 65 48 8b 15 7a c7 fd 79 f7 c2 00 00 02 00 75 02 <0f> ff 48 81 e1 00 f0 ff ff 0f 22 d9 65 66 c7 05 54 c7 fd 79 00 What's wrong here? That is v4.13-11559-g6d8ef53e8b2f CONFIG_DEBUG_VM is not set Haswell i5-4570 Thomas