linux-kernel - Re: [Query]: trace-cmd crashing with '-e syscalls' on 3.13-rc1

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Date:	Tue, 24 Dec 2013 21:14:31 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linaro Networking <linaro-networking@...aro.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [Query]: trace-cmd crashing with '-e syscalls' on 3.13-rc1

On 24 December 2013 19:18, Steven Rostedt <rostedt@...dmis.org> wrote:
> Can you also produce this with just
> "echo 1 > /sys/kernel/debug/tracing/events/syscalls/enable"?

Will do that on 26th..

>> [  299.998874] Unable to handle kernel NULL pointer dereference at
>> virtual address 0000001b
>> [  300.005554] pgd = ed9fc000
>> [  300.008201] [0000001b] *pgd=6eb1e831, *pte=00000000, *ppte=00000000
>> [  300.014428] Internal error: Oops: 17 [#1] PREEMPT SMP ARM
>> [  300.019812] Modules linked in:
>> [  300.022847] CPU: 0 PID: 2172 Comm: is-cpu-isolated Not tainted
>> 3.13.0-rc1-00090-gd6eaf98-dirty #141
>
> Are you running some isolated CPU test? Do you have NO_HZ_FULL enabled
> too?

Yeah, I am using NO_HZ_FULL with CPUSets. Only one task (stress) is running
on CPU1 and CPU0 is running everything else..

> I Cc'd Frederic too.
>
> Note, I'm on PTO for two weeks (coming back Jan 6th), so I wont be
> debugging this any time soon. My wife has me debugging house issues
> (putting in a new floor for laundry room, painting, re-arranging
> furniture, etc). (I have to sneak to the computer in order to goof off
> and respond to this email ;-)

:)
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