linux-kernel - Re: mmiotracer hangs the system

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Message-ID: <CAHp75Vc9VOpPW4UEDPkqsmyK=7gYu82nm_rdV0JNtPx8=Zpu5Q@mail.gmail.com>
Date:	Tue, 2 Aug 2016 13:36:55 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: mmiotracer hangs the system

On Tue, Aug 2, 2016 at 1:08 PM, Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
> Hi!
>
> I'm trying to use mmio tracer with recent kernels (in this particular
> case today's linux-next).

Additional info. I took v4.4.16 and add the following to the default
x86_64_defconfig:
+CONFIG_MMIOTRACE=y
+CONFIG_SERIAL_8250_DW=y
+CONFIG_MFD_INTEL_LPSS=y
+CONFIG_MFD_INTEL_LPSS_PCI=y

The problem is still reproduced.
I can't take earlier kernels because the mentioned driver (intel-lpss)
was introduced in v4.4.

-- 
With Best Regards,
Andy Shevchenko