Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 320A3C433F5 for ; Tue, 7 Dec 2021 10:34:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235193AbhLGKiG (ORCPT ); Tue, 7 Dec 2021 05:38:06 -0500 Received: from ns.iliad.fr ([212.27.33.1]:34688 "EHLO ns.iliad.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229449AbhLGKiF (ORCPT ); Tue, 7 Dec 2021 05:38:05 -0500 Received: from ns.iliad.fr (localhost [127.0.0.1]) by ns.iliad.fr (Postfix) with ESMTP id CCE651FFD9; Tue, 7 Dec 2021 11:34:34 +0100 (CET) Received: from sakura (freebox.vlq16.iliad.fr [213.36.7.13]) by ns.iliad.fr (Postfix) with ESMTP id BF3101FF88; Tue, 7 Dec 2021 11:34:34 +0100 (CET) Message-ID: <12988dafdf7e14ba6db69ab483a2eb53e411fc0d.camel@freebox.fr> Subject: Re: [PATCH] powerpc/603: Fix boot failure with DEBUG_PAGEALLOC and KFENCE From: Maxime Bizon Reply-To: mbizon@freebox.fr To: Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman Cc: "linux-kernel@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "stable@vger.kernel.org" Date: Tue, 07 Dec 2021 11:34:34 +0100 In-Reply-To: References: Organization: Freebox Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP ; ns.iliad.fr ; Tue Dec 7 11:34:34 2021 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2021-12-07 at 06:10 +0000, Christophe Leroy wrote: Hello, With the patch applied and CONFIG_DEBUG_PAGEALLOC=y CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT=y CONFIG_DEBUG_VM=y I get tons of this during boot: [ 0.000000] Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes, linear) [ 0.000000] Inode-cache hash table entries: 131072 (order: 7, 524288 bytes, linear) [ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: CPU: 0 PID: 0 at arch/powerpc/mm/pgtable.c:194 set_pte_at+0x18/0x160 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.15.0+ #442 [ 0.000000] NIP: 80015ebc LR: 80016728 CTR: 800166e4 [ 0.000000] REGS: 80751dd0 TRAP: 0700 Not tainted (5.15.0+) [ 0.000000] MSR: 00021032 CR: 42228882 XER: 20000000 [ 0.000000] [ 0.000000] GPR00: 800b8dc8 80751e80 806c6300 807311d8 807a1000 8ffffe84 80751ea8 00000000 [ 0.000000] GPR08: 007a1591 00000001 007a1180 00000000 42224882 00000000 3ff9c608 3fffd79c [ 0.000000] GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 800166e4 807a2000 [ 0.000000] GPR24: 807a1fff 807311d8 807311d8 807a2000 80768804 00000000 807a1000 007a1180 [ 0.000000] NIP [80015ebc] set_pte_at+0x18/0x160 [ 0.000000] LR [80016728] set_page_attr+0x44/0xc0 [ 0.000000] Call Trace: [ 0.000000] [80751e80] [80058570] console_unlock+0x340/0x428 (unreliable) [ 0.000000] [80751ea0] [00000000] 0x0 [ 0.000000] [80751ec0] [800b8dc8] __apply_to_page_range+0x144/0x2a8 [ 0.000000] [80751f00] [80016918] __kernel_map_pages+0x54/0x64 [ 0.000000] [80751f10] [800cfeb0] __free_pages_ok+0x1b0/0x440 [ 0.000000] [80751f50] [805cfc8c] memblock_free_all+0x1d8/0x274 [ 0.000000] [80751f90] [805c5e0c] mem_init+0x3c/0xd0 [ 0.000000] [80751fb0] [805c0bdc] start_kernel+0x404/0x5c4 [ 0.000000] [80751ff0] [000033f0] 0x33f0 [ 0.000000] Instruction dump: [ 0.000000] 7c630034 83e1000c 5463d97e 7c0803a6 38210010 4e800020 9421ffe0 93e1001c [ 0.000000] 83e60000 81250000 71290001 41820014 <0fe00000> 7c0802a6 93c10018 90010024 -- Maxime