linux-kernel - [PATCH 0/2] fixed dump_backtrace() when task running on another cpu

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Message-Id: <1586779466-4439-1-git-send-email-wangqing@vivo.com>
Date:   Mon, 13 Apr 2020 20:04:22 +0800
From:   Wang Qing <wangqing@...o.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        James Morse <james.morse@....com>,
        Mark Rutland <mark.rutland@....com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        jinho lim <jordan.lim@...sung.com>,
        Wang Qing <wangqing@...o.com>,
        Dave Martin <Dave.Martin@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com
Subject: [PATCH 0/2] fixed dump_backtrace() when task running on another cpu

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