Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751576AbdINQsT (ORCPT ); Thu, 14 Sep 2017 12:48:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:60058 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751400AbdINQsS (ORCPT ); Thu, 14 Sep 2017 12:48:18 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EBED521D28 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=luto@kernel.org X-Google-Smtp-Source: AOwi7QC3oCT2RdVaIgL0Tqz8b3XwlBb9k1p0WqvwoSZjvjBIc72mmKSOAX1CTtOUOZdMYYW2QkDTyJPLpLc0sQhRCdo= MIME-Version: 1.0 In-Reply-To: References: <207325281bb02ccd9a230ea38255de08@molgen.mpg.de> From: Andy Lutomirski Date: Thu, 14 Sep 2017 09:47:56 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: WARNING: CPU: 1 PID: 0 at arch/x86/mm/tlb.c:237 initialize_tlbstate_and_flush+0x120/0x130 To: Thomas Voegtle Cc: Andy Lutomirski , Paul Menzel , X86 ML , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2580 Lines: 69 On Wed, Sep 13, 2017 at 5:59 AM, Thomas Voegtle wrote: > 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? > Try Linus' tree now -- it should be fixed.