Re: [PATCH v4 01/10] block: Introduce queue limits for copy-offload support

Hannes Reinecke
2022-04-27T12:50:40Z

On 4/26/22 12:12, Nitesh Shetty wrote:
> Add device limits as sysfs entries,
> - copy_offload (RW)
> - copy_max_bytes (RW)
> - copy_max_hw_bytes (RO)
> - copy_max_range_bytes (RW)
> - copy_max_range_hw_bytes (RO)
> - copy_max_nr_ranges (RW)
> - copy_max_nr_ranges_hw (RO)
>
> Above limits help to split the copy payload in block layer.
> copy_offload, used for setting copy offload(1) or emulation(0).
> copy_max_bytes: maximum total length of copy in single payload.
> copy_max_range_bytes: maximum length in a single entry.
> copy_max_nr_ranges: maximum number of entries in a payload.
> copy_max_*_hw_*: Reflects the device supported maximum limits.
>
> Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
> Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
> Signed-off-by: Arnav Dawn <arnav.dawn@samsung.com>
> ---
> Documentation/ABI/stable/sysfs-block | 83 ++++++++++++++++
> block/blk-settings.c | 59 ++++++++++++
> block/blk-sysfs.c | 138 +++++++++++++++++++++++++++
> include/linux/blkdev.h | 13 +++
> 4 files changed, 293 insertions(+)
>

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
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