Re: [PATCH v4 1/9] statx: add direct I/O alignment information

Martin K. Petersen
2022-07-22T17:32:09Z

Eric,

> Therefore, let's expose this information via statx(). Add the
> STATX_DIOALIGN flag and two new statx fields associated with it:
>
> * stx_dio_mem_align: the alignment (in bytes) required for user memory
> buffers for DIO, or 0 if DIO is not supported on the file.
>
> * stx_dio_offset_align: the alignment (in bytes) required for file
> offsets and I/O segment lengths for DIO, or 0 if DIO is not supported
> on the file. This will only be nonzero if stx_dio_mem_align is
> nonzero, and vice versa.

Nice to finally have a generic interface for this!

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>

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Martin K. Petersen Oracle Linux Engineering