Re: [RFC] blk: increase logical_block_size to unsigned int

Sergey Senozhatsky
2017-01-09T14:34:23Z

On (01/09/17 14:04), Minchan Kim wrote:
> Mostly, zram is used as swap system on embedded world so it want to do IO
> as PAGE_SIZE aligned/size IO unit. For that, one of the problem was
> blk_queue_logical_block_size(zram->disk->queue, PAGE_SIZE) made overflow
> in *64K page system* so [1] changed it to constant 4096.
> Since that, partial IO can happen so zram should handle it which makes zram
> complicated[2].
>

I thought that zram partial IO support is there because some file
systems cannot cope with large logical_block_size. like FAT, for
example. am I wrong?

-ss