[ofa-general] [PATCH] mlx4: implement MOD_STAT_CFG command to use for changing ConnectX page size

[Tziporet Koren]

Roland Dreier wrote:
>  > I just remembered.  If we create FMRs using 512 as the device page size, we will
>  > use 8 times the MTT entries as we would if the page size was 4K.  The ULP (rds and iser)
>  > can run out of MTT entries much faster.
>
> Seems like a ULP issue -- if they don't want 512 byte pages for FMRs,
> why are they asking for them?
>   

I agree - each ULP should ask the size needed and not relay on the HCA 
to decide this.
This feature was added for backward compatibility of older kernel when 
using the new coming FW and no need to add more options to the driver.

Tziporet