Dave Chinner <da...@fromorbit.com> wrote:

>       st_blksize              - file block size
>       st_alloc_blksize        - allocation block size/alignment
>       st_small_io_size        - IO size/alignment that avoids
>                                 filesystem/page cache RMW
>       st_preferred_io_size    - preferred IO size for general
>                                 usage.
>       st_large_io_size        - IO size/alignment for high
>                                 bandwidth sequential IO

What is st_blksize here?  Is it directly comparable (if such a thing is
possible) to st_blksize in struct stat?  Or does st_preferred_io_size map to
the current st_blksize and your st_blksize map to actual media block size (and
if so, is that the same as st_alloc_blksize?  - I presume st_alloc_blksize
must be a multiple of the media block size).

David


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