Re: mmc0: Invalid maximum block size, assuming 512 bytes

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On 22/01/2016 08:17, Mason wrote:

> On 22/01/2016 03:07, Shawn Lin wrote:
> 
>> On 2016/1/21 23:00, Mason wrote:
>>
>>> So that means I have to write code in
>>> drivers/mmc/host/sdhci-of-arasan.c correct?
>>
>> It depends. If you think 512 block size if okay for you, leave it alone.
>> Otherwise, add it in drivers/mmc/host/sdhci-of-arasan.c :)
> 
> When I measured the read/write throughput to an attached
> SD card, I got around 16 MB/s, and I thought raising the
> block size might help with throughput?
> 
> I'll test and report back.

Haven't had time to test yet, but I wanted to ask experienced
folks what to expect when raising the block size from 512 to
2048 bytes?

I don't think it would speed up dd'ing the entire device?
(Especially if we use a large block size in dd.)

Would it perhaps speed up myriads of random accesses?

Regards.

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