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Date:   Tue, 19 Mar 2019 23:58:58 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     He Zhe <zhe.he@windriver.com>
Cc:     <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
        <will.deacon@arm.com>, <joel@joelfernandes.org>,
        <namhyung@kernel.org>, <akpm@linux-foundation.org>,
        <tglx@linutronix.de>, <rppt@linux.ibm.com>,
        <linux@dominikbrodowski.net>, <adobriyan@gmail.com>, <cai@lca.pw>,
        <ard.biesheuvel@linaro.org>, <axboe@kernel.dk>,
        <linux-kernel@vger.kernel.org>
Subject: Re: User Stack Tracer Causes Crash
Message-ID: <20190319235858.084b75b1@oasis.local.home>
In-Reply-To: <897cf5cf-fc24-8a64-cb28-847f2d2e63d2@windriver.com>
References: <897cf5cf-fc24-8a64-cb28-847f2d2e63d2@windriver.com>
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On Wed, 20 Mar 2019 11:15:10 +0800
He Zhe <zhe.he@windriver.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.

-- 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
>