linux-kernel - Re: mmiotracer hangs the system

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Message-ID: <CAEXux-aN1JxuTZb622SZiJaeyLY_1O+GHFfZ3BrawDGahi_dhg@mail.gmail.com>
Date:   Fri, 19 Aug 2016 12:35:24 +0200
From:   karol herbst <karolherbst@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: mmiotracer hangs the system

Hi everybody,

is there any update on that issue I missed somehow? I really don't
want to leave the mmiotracer in a state, where it breaks something
while fixing other issues.

But for now, without being able to even reproduce the issue, I can't
really do much, because the code in the current state looks sane to
me. Maybe this case includes the mmiotracer cleaning things up and
arms new region for mmiotracing and that's why it fails? Besides that,
I have no idea and no way to reproduce this, so I can't help this way.

Greetings

2016-08-02 18:13 GMT+02:00 Steven Rostedt <rostedt@...dmis.org>:
> On Tue, 2 Aug 2016 19:08:24 +0300
> Andy Shevchenko <andy.shevchenko@...il.com> wrote:
>
>> I don't think so, since linux-next doesn't work until I revert this commit.
>>
>> I can try exactly v4.6 (yep, I tried stable versions, including
>> v4.4.16 that's why all of them failed to me) if you still would like
>> me to do so.
>
> If linux-next doesn't work, then don't bother.
>
> That commit obviously broke something and you'll probably need help
> from Karol to fix it.
>
> Thanks,
>
> -- Steve