[U-Boot] Loading kernel from SD card slow on MinnowBoard Turbot since v2016.09

[Jaehoon Chung]

Hi,

On 10/21/2016 03:32 PM, Bin Meng wrote:
> +Simon, Stefan,
> 
> On Fri, Oct 21, 2016 at 12:36 PM, Jaehoon Chung <jh80.chung at samsung.com> wrote:
>> Hi,
>>
>> On 10/21/2016 01:27 AM, Raschen Josef wrote:
>>> Hi,
>>>
>>> Reading a kernel image from an SD card via the fatload command on the MinnowBoard Turbot seems to be significantly slower since v2016.09 compared to v2016.07:
>>>
>>> v2016.07
>>> => fatload mmc 1:1 ${loadaddr} bzImage ; zboot ${loadaddr}
>>> reading bzImage
>>> 5749232 bytes read in 129 ms (42.5 MiB/s)
>>>
>>> v2016.09
>>> => fatload mmc 1:1 ${loadaddr} bzImage ; zboot ${loadaddr}
>>> reading bzImage
>>> 5749232 bytes read in 249 ms (22 MiB/s)
>>>
>>> The same for v2016.11-rc1.
>>>
>>> I am using U-Boot in bare mode on the board. Any idea what causes this?
>>
>> Could you share which driver you use?
>>
> 
> Could you bisect to see which commit introduced this regression?

I did..but i didn't see this issue on my boards. :(
So as Bin's suggestion, could you try to bisect..?

Best Regards,
Jaehoon Chung

> 
> Regards,
> Bin
> 
> 
>