Re: Poor write performance to boot area using rcar-gen3-sdhi

[Richard Weinberger <richard@nod.at>]

----- Ursprüngliche Mail -----
> Von: "Christian Loehle" <CLoehle@hyperstone.com>
>> Can it be that rcar-gen3-sdhi changes some timings after switching?
>> Either in software or on hardware.
> 
> Neither should be aware of the notion of a boot or user area partition.
> Anything below mmc/core isn't, if we exclude the boot operation which is read
> only, so not applicable to your problem.
> So also a
> while true; do dd if=/dev/zero of=/dev/mmcblkXboot0 bs=128K status=progress;
> done
> gives you like ~50KB/s consistently?

Exactly. 

On the other hand, the very same command on /dev/mmcblk1p13 gives me always between
17 and 20 MB/s.

Thanks,
//richard