From mboxrd@z Thu Jan  1 00:00:00 1970
From: paweljarosz3691@gmail.com (=?UTF-8?Q?Pawe=c5=82_Jarosz?=)
Date: Thu, 13 Oct 2016 10:55:17 +0200
Subject: [PATCH] ARM: dts: rockchip: Reserve unusable memory region on
 rk3066
In-Reply-To: <e3746f9a-084e-163e-a412-1a1fc66926d5@rock-chips.com>
References: <20161001140939.GA31220@vaio-ubuntu>
 <6239b970-09d3-f7ee-e6f5-c019eaedb725@rock-chips.com>
 <f8aba48d-6c69-b246-4cb2-48a2770c80e4@gmail.com>
 <67831fd0-76af-a793-0b2f-958e45633fe8@rock-chips.com>
 <149df5ee-3478-6d15-bb76-47becac146e9@gmail.com>
 <e3746f9a-084e-163e-a412-1a1fc66926d5@rock-chips.com>
Message-ID: <95e45ae4-f8cd-c7e0-4f3e-0ad0a5183078@gmail.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi


W dniu 13.10.2016 o 09:12, Huang, Tao pisze:
> Hi, Pawe?:
> On 2016?10?10? 17:11, Pawe? Jarosz wrote:
>> W dniu 10.10.2016 o 09:18, Huang, Tao pisze:
>>> Our IC guy need us tell them which master can not access such area, DMA
>>> or EMMC Controller or GPU, etc? Could you tell me how to reproduce such
>>> issue?
>>> And we can confirm CPU core can access this memory through /dev/mem and
>>> the test board is 1GB too. Personally, I don't think RK3066 has such
>>> limit because when we verify this chip, we don't found such limit at all.
>>>
>>> Thanks,
>>> Huang, Tao
>> I'm getting this on Ubuntu 16.04 with mainline kernel.
>> My board always freezes when i type: "memtester 800M"
>>
> We try run memtest 800M with Linux kernel 4.8, which killed by OOM.
> But if we run:
> # memtester -p 0x9F000000 16K 1
> memtester version 4.3.0 (32-bit)
> Copyright (C) 2001-2012 Charles Cazabon.
> Licensed under the GNU General Public License version 2 (only).
>
> pagesize is 4096
> pagesizemask is 0xfffff000
> want 0MB (16384 bytes)
> Loop 1/1:
>     Stuck Address       : ok
>     Random Value        : ok
>     Compare XOR         : ok
>     Compare SUB         : ok
>     Compare MUL         : ok
>     Compare DIV         : ok
>     Compare OR          : ok
>     Compare AND         : ok
>     Sequential Increment: ok
>     Solid Bits          : ok
>     Block Sequential    : ok
>     Checkerboard        : ok
>     Bit Spread          : ok
>     Bit Flip            : ok
>     Walking Ones        : ok
>     Walking Zeroes      : ok
>     8-bit Writes        : ok
>     16-bit Writes       : ok
>
> So these memory should be fine to CPU core. Maybe your system just
> freeze because out of memory.
>

weird ... memtester -p 0x9F000000 16K 1 gave me the same result.

Could you try one last command:

	memtester 400M

Values > 200M causing freeze.

If this won't do it, than maybe there is something wrong with my board.

Thanks for your time.