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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 A3F13C433E9 for ; Wed, 17 Mar 2021 14:24:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DC1B64F37 for ; Wed, 17 Mar 2021 14:24:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231784AbhCQOXg (ORCPT ); Wed, 17 Mar 2021 10:23:36 -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