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 7DD2CC38A2C for ; Mon, 13 Apr 2020 13:17:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A9D720775 for ; Mon, 13 Apr 2020 13:17:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729400AbgDMMFN (ORCPT ); Mon, 13 Apr 2020 08:05:13 -0400 Received: from m17617.mail.qiye.163.com ([59.111.176.17]:43272 "EHLO m17617.mail.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728558AbgDMMFG (ORCPT ); Mon, 13 Apr 2020 08:05:06 -0400 Received: from wangqing-virtual-machine.localdomain (unknown [157.0.31.122]) by m17617.mail.qiye.163.com (Hmail) with ESMTPA id 8A9CD26246F; Mon, 13 Apr 2020 20:04:53 +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: [PATCH 0/2] fixed dump_backtrace() when task running on another cpu Date: Mon, 13 Apr 2020 20:04:22 +0800 Message-Id: <1586779466-4439-1-git-send-email-wangqing@vivo.com> X-Mailer: git-send-email 2.7.4 X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZTlVMQk5LS0tLTE1JQkhCTllXWShZQU hPN1dZLVlBSVdZCQ4XHghZQVk1NCk2OjckKS43PlkG X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6MTo6SSo5KTgzKAsRT041Pz42 OhQKFEtVSlVKTkNNTExCT0JIQk9KVTMWGhIXVQwaFRwKEhUcOw0SDRRVGBQWRVlXWRILWUFZSk5M VUtVSEpVSklJWVdZCAFZQUlOSEo3Bg++ X-HM-Tid: 0a71736d95e09375kuws8a9cd26246f 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. We have no interface whether the task is running, so we need to add an interface and distinguish CONFIG_SMP. Wang Qing (2): [V2 1/2]sched:add task_running_oncpu [V2 2/2]ARM64:fixed dump_backtrace() when task running on another cpu arch/arm64/kernel/traps.c | 7 +++++++ include/linux/sched.h | 10 ++++++++++ 2 files changed, 17 insertions(+) -- 2.7.4