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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 5E7B0C2BA19 for ; Tue, 14 Apr 2020 12:36:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F85320775 for ; Tue, 14 Apr 2020 12:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2502089AbgDNMgw (ORCPT ); Tue, 14 Apr 2020 08:36:52 -0400 Received: from m177134.mail.qiye.163.com ([123.58.177.134]:14867 "EHLO m177134.mail.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2502073AbgDNMgr (ORCPT ); Tue, 14 Apr 2020 08:36:47 -0400 Received: from wangqing-virtual-machine.localdomain (unknown [157.0.31.122]) by m17617.mail.qiye.163.com (Hmail) with ESMTPA id CFD13261925; Tue, 14 Apr 2020 20:36:41 +0800 (CST) From: Wang Qing To: Catalin Marinas , Will Deacon , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , James Morse , Mark Rutland , "Eric W. Biederman" , Thomas Gleixner , jinho lim , Wang Qing , Dave Martin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: opensource.kernel@vivo.com Subject: [V3 0/3] Fixed dump_backtrace() when task running on another cpu Date: Tue, 14 Apr 2020 20:36:29 +0800 Message-Id: <1586867796-5768-1-git-send-email-wangqing@vivo.com> X-Mailer: git-send-email 2.7.4 X-HM-Spam-Status: e1kfGhgUHx5ZQUlXWQgYFAkeWUFZTVVOTUxCQkJDSEJMQ0lMSllXWShZQU hPN1dZLVlBSVdZCQ4XHghZQVk1NCk2OjckKS43PlkG X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6Mi46Aio4KjgzQwoTHRkwMCkL LQ4wCTBVSlVKTkNNQ01MQ0tJSU5NVTMWGhIXVQwaFRwKEhUcOw0SDRRVGBQWRVlXWRILWUFZSk5M VUtVSEpVSklJWVdZCAFZQUhLTks3Bg++ X-HM-Tid: 0a7178b1103a9375kuwscfd13261925 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We cannot get FP and PC when the task is running on another CPU, task->thread.cpu_context is the last time the task was switched out, it's better to give a reminder than to provide wrong information for example when Task blocked in spinlock/interrupt/busy loop. The task_running() should be renamed to task_running_on_rq() like the naming of task_running_on_cpu(), this is what it originally mean. Add task_running() no rq required. V2: - Add task_running_oncpu() v3: - Renamed task_running() to task_running_on_rq() - Renamed task_running_oncpu() to task_running() Wang Qing (3): ARM64:fixed dump_backtrace() when task running on another cpu sched:add task_running() sched:rename task_running() and to task_running_on_rq arch/arm64/kernel/traps.c | 7 +++++++ include/linux/sched.h | 10 ++++++++++ kernel/sched/core.c | 14 +++++++------- kernel/sched/deadline.c | 6 +++--- kernel/sched/fair.c | 2 +- kernel/sched/rt.c | 6 +++--- kernel/sched/sched.h | 2 +- 7 files changed, 32 insertions(+), 15 deletions(-) -- 2.7.4