Re: [PATCH] block: make queue limits workable in case of 64K PAGE_SIZE

[Ming Lei <ming.lei@redhat.com>]

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@acm.org/).

'502 Bad Gateway' is returned for the above link.

Thanks,
Ming