Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp551555pxf; Wed, 17 Mar 2021 10:18:16 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy/jDQ7TwLd67iN+oe2LDPUjQmjsZluSL7ieFUB0ur4qpvPaDZ4atkKyOp00jCxUJrsBvqw X-Received: by 2002:a17:906:eb4e:: with SMTP id mc14mr35663124ejb.169.1616001496315; Wed, 17 Mar 2021 10:18:16 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1616001496; cv=none; d=google.com; s=arc-20160816; b=nkDXwsSbs2mmMpIoyxx1up5JUvzqFD/CWf/ItG8iKbGSGFYPu8luL+bKgYW9xqtPe5 Q84VW5ISym5FKiPHSTirrfSeLuji5BTVYNiqcSAcOc6QcBP0bvXA/AKLCN76bMwKevFj OpXXVJ9RPhUCCrVimFW0C89lT5QkrN+wGd6chgTBBHfFtM7PGwzrc21YwQCjEMf6ZGHl kD04rNiqu9YixNejMF6GnIt5MQG8OgOPLV0HcCMtu/9cEwIw4cjxOyUvPMBrGATBbjci +2UiooxAw6oWVapVNcAH25GQVfOlFc4ETkPCKrDHDndbQtxzeAqpIRLBBqqMMzp7ikNK hLWQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:subject:cc:to:from; bh=2hBTrsGGze3MGCk6oCy0lmhEh3mwWOJy+T+I1t3QGsw=; b=UYwApdurMaFHYWgMjV+znZjORPPF0UrlLprgyaLKmFxsVmzLP8iJ47iNX15Q6a0k0C tmJdhKIE9C0XYMWnRt8miuI6M+R2aaHehRkopHoEut/KbHagdYuFSuu8JFoGYnihv5Ir qaV/w5lAoRKtDX44qPSXdL6V9rQQoK0sz3Py+4B4CYBaxo/KACe6SenvJnmLfmeN3IQl GDGfdvSAUI1gvYbbDn7BJMQLD6R6NuiRfW1LcOVe6aYo/kd03jvDSF/1ZbfxoKkhwFFJ nURfBMVBditC7mcS/dxUsWaPYG0kO6VBEdcATJTmTrw7PhvffJZagRMDcXnwIOOfxO8h KlnQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id q2si2404580ejf.708.2021.03.17.10.17.53; Wed, 17 Mar 2021 10:18:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230290AbhCQOXd (ORCPT + 99 others); Wed, 17 Mar 2021 10:23:33 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:14364 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230516AbhCQOXR (ORCPT ); Wed, 17 Mar 2021 10:23:17 -0400 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4F0slb2WyHz90YY; Wed, 17 Mar 2021 22:21:15 +0800 (CST) Received: from mdc.huawei.com (10.175.112.208) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.498.0; Wed, 17 Mar 2021 22:23:01 +0800 From: Chen Jun To: , CC: , , , Subject: [PATCH 0/2] Fix page_owner broken on arm64 Date: Wed, 17 Mar 2021 14:20:48 +0000 Message-ID: <20210317142050.57712-1-chenjun102@huawei.com> X-Mailer: git-send-email 2.9.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.112.208] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Chen Jun (2): stacktrace: Move struct stacktrace_cookie to stacktrace.h arm64: stacktrace: Add skip when task == current arch/arm64/kernel/stacktrace.c | 5 +++-- include/linux/stacktrace.h | 7 +++++++ kernel/stacktrace.c | 7 ------- 3 files changed, 10 insertions(+), 9 deletions(-) -- 2.9.4