On Wed, Jan 01, 2025 at 06:30:30PM -0800, Bart Van Assche wrote: > On 1/1/25 5:56 PM, Ming Lei wrote: > > In RH lab, it has been found that max segment size of some mmc card is > > less than 64K, then this kind of card can't work in case of 64K PAGE_SIZE. > > That means that that MMC card is incompatible with the 64K page size. Is there any such linux kernel compatibility standard? If yes, please share it here. > > Additionally, this patch looks wrong to me. There are good reasons why the > block layer requires that the DMA segment size is at least as large > as the page size. Do you think 512byte sector can't be DMAed? > > You may want to take a look at this rejected patch series: > Bart Van Assche, "PATCH v6 0/8] Support limits below the page size", > June 2023 (https://lore.kernel.org/linux-block/20230612203314.17820-1-bvanassche@xxxxxxx/). '502 Bad Gateway' is returned for the above link. Thanks, Ming
