linux-kernel - Re: User Stack Tracer Causes Crash

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Date:   Wed, 20 Mar 2019 13:10:40 +0800
From:   He Zhe <zhe.he@...driver.com>
To:     Steven Rostedt <rostedt@...dmis.org>
CC:     <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
        <will.deacon@....com>, <joel@...lfernandes.org>,
        <namhyung@...nel.org>, <akpm@...ux-foundation.org>,
        <tglx@...utronix.de>, <rppt@...ux.ibm.com>,
        <linux@...inikbrodowski.net>, <adobriyan@...il.com>, <cai@....pw>,
        <ard.biesheuvel@...aro.org>, <axboe@...nel.dk>,
        <linux-kernel@...r.kernel.org>
Subject: Re: User Stack Tracer Causes Crash



On 3/20/19 11:58 AM, Steven Rostedt wrote:
> On Wed, 20 Mar 2019 11:15:10 +0800
> He Zhe <zhe.he@...driver.com> wrote:
>
>> Hi,
>>
>> User stack tracer causes crash and hang since the following commit till now(5.1-rc1).
>>
>> c3bc8fd637a9 ("tracing: Centralize preemptirq tracepoints and unify their usage")
> Can you send me your .config.

Attached.

Zhe

>
> -- Steve
>
>> echo 1 > /proc/sys/kernel/stack_tracer_enabled
>> echo userstacktrace > /sys/kernel/debug/tracing/trace_options
>> echo 1 > /sys/kernel/debug/tracing/events/enable
>> dmesg
>>


View attachment "config" of type "text/plain" (139788 bytes)