linux-kernel - Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler"

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Message-ID: <CANqRtoTA=Yg5f4pQxPaNQP9L=XG3pfJWk18jsz2M15HY0yaN3Q@mail.gmail.com>
Date:	Mon, 6 Jul 2015 13:42:12 +0900
From:	Magnus Damm <magnus.damm@...il.com>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Simon Horman <horms@...ge.net.au>,
	Kevin Hilman <khilman@...nel.org>,
	Tyler Baker <tyler.baker@...aro.org>,
	Borislav Petkov <bp@...en8.de>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	SH-Linux <linux-sh@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Possible regression due to "tick: broadcast: Prevent livelock
 from event handler"

Hi Wolfram,

Thanks for investigating this.

On Sat, Jul 4, 2015 at 12:09 AM, Wolfram Sang <wsa@...-dreams.de> wrote:
>
>> Ok. So it's unrelated to deep idle states. Any chance of poking with
>> JTAG at the frozen box? If not, are there GPIOs which you could use to
>> monitor certain state?
>
> No JTAGger here at the moment. And no manual/schematics for this board
> :(

Since EMEV2 includes a dual Cortex-A9 you can use OpenOCD with a
Flyswatter JTAG.

I've tried the following lines for the openocd configuration file, if
you need any help let me know!

# --- emev2 (CA9 Dual) on KZM9D ---
#target create emev2.cpu0 cortex_a -chain-position auto0.tap -dbgbase
0x80010000 -coreid 0
#target create emev2.cpu1 cortex_a -chain-position auto0.tap -dbgbase
0x80012000 -coreid 1

Cheers,

/ magnus
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