From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A804C433E6 for ; Wed, 17 Mar 2021 22:24:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E16A264F2A for ; Wed, 17 Mar 2021 22:24:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229944AbhCQWXj (ORCPT ); Wed, 17 Mar 2021 18:23:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:55452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229809AbhCQWXO (ORCPT ); Wed, 17 Mar 2021 18:23:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EFD7264DE7; Wed, 17 Mar 2021 22:23:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1616019794; bh=73XvZj92wTv5ZQxPf5DIjS3QKL6XBRR6zTcruA3a6WY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=VACpmxCCk2UQqM1AlhvoMUq+diWMo8zS+IpRfgc0dSTGJ0bjvu3okx6ZMalKy0Y+N 6lOH96jZPQ9w5fYnD1mUxQuvAUnvspM2xWwGo5AcmfCYF0NWwxIkyAQhHhm3wyap5d Lc0YCVJgd+dg1s+K5Nnd61ijZoGBrfXgcUUVaZSo= Date: Wed, 17 Mar 2021 15:23:12 -0700 From: Andrew Morton To: Chen Jun Cc: , , , , Subject: Re: [PATCH 0/2] Fix page_owner broken on arm64 Message-Id: <20210317152312.32e6fc7dd469cd7df57ed2e5@linux-foundation.org> In-Reply-To: <20210317142050.57712-1-chenjun102@huawei.com> References: <20210317142050.57712-1-chenjun102@huawei.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 17 Mar 2021 14:20:48 +0000 Chen Jun wrote: > On arm64, cat /sys/kernel/debug/page_owner > All pages return the same stack > stack_trace_save+0x4c/0x78 > register_early_stack+0x34/0x70 > init_page_owner+0x34/0x230 > page_ext_init+0x1bc/0x1dc > > The reason is arch_stack_walk save 2 more entries than before. > > To fix it, add skip in arch_stack_walk > > *** BLURB HERE *** > > 1. Prepare for 2, move stacktrace_cookie to .h > 2. Fix the problem > 5fc57df2f6fd was September 2020, so I assume we'll be needing cc:stable on these? (I'll also assume that the arm folks will be handling these) From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B08B3C433DB for ; Wed, 17 Mar 2021 22:32:18 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F28D564F2A for ; Wed, 17 Mar 2021 22:32:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F28D564F2A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Mime-Version:References:In-Reply-To:Message-Id: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=WWjhs9HnThNfZSL+gPDxemlPUKklWJDgrZfViYnR27E=; b=Zr2YnCaVlk0o70eoxOb8y30jX Uam3tMSNLiU33LItyJEfDcViQi0j51q68zZYa1g0ab/9A5RgAe+Zylct1FgJ8oMYsGAghtDrMxoNN ivL1AkJWvbUFmTeRoeqtVsAGuoQktPIMQLIpoQJZyDTcZG9p68Fq/WIgEvK0vMLzglns2YsAkgYDd y2E5liih2q3LSZEvjy0VZMoFbTxYJ7Mb+ytUxWDRfCIj/wzCqf/Nez9oa2GSMJJhl269R3kaxC1Rf pVGFbiEPUk8jfBowr3dRFxWF2qKOqPhgPHWlLFvHvS/tkOY2cHzTVbiKGhU33nPtDOSR1xVx286J9 I7qkGZxww==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lMedg-0041zn-3Q; Wed, 17 Mar 2021 22:28:41 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lMeZQ-0041iw-FN for linux-arm-kernel@lists.infradead.org; Wed, 17 Mar 2021 22:23:22 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id EFD7264DE7; Wed, 17 Mar 2021 22:23:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1616019794; bh=73XvZj92wTv5ZQxPf5DIjS3QKL6XBRR6zTcruA3a6WY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=VACpmxCCk2UQqM1AlhvoMUq+diWMo8zS+IpRfgc0dSTGJ0bjvu3okx6ZMalKy0Y+N 6lOH96jZPQ9w5fYnD1mUxQuvAUnvspM2xWwGo5AcmfCYF0NWwxIkyAQhHhm3wyap5d Lc0YCVJgd+dg1s+K5Nnd61ijZoGBrfXgcUUVaZSo= Date: Wed, 17 Mar 2021 15:23:12 -0700 From: Andrew Morton To: Chen Jun Cc: , , , , Subject: Re: [PATCH 0/2] Fix page_owner broken on arm64 Message-Id: <20210317152312.32e6fc7dd469cd7df57ed2e5@linux-foundation.org> In-Reply-To: <20210317142050.57712-1-chenjun102@huawei.com> References: <20210317142050.57712-1-chenjun102@huawei.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210317_222316_960122_AA330F9B X-CRM114-Status: GOOD ( 10.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, 17 Mar 2021 14:20:48 +0000 Chen Jun wrote: > On arm64, cat /sys/kernel/debug/page_owner > All pages return the same stack > stack_trace_save+0x4c/0x78 > register_early_stack+0x34/0x70 > init_page_owner+0x34/0x230 > page_ext_init+0x1bc/0x1dc > > The reason is arch_stack_walk save 2 more entries than before. > > To fix it, add skip in arch_stack_walk > > *** BLURB HERE *** > > 1. Prepare for 2, move stacktrace_cookie to .h > 2. Fix the problem > 5fc57df2f6fd was September 2020, so I assume we'll be needing cc:stable on these? (I'll also assume that the arm folks will be handling these) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel