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block, documentation: Explain the word 'segments' 

Several block layer users who are not kernel developers do not know that
the word 'segment' refers to an element in a DMA scatter/gather list. Make
the block layer documentation easier to understand by stating explicitly
what the word 'segment' stands for.

Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
alistair/sunxi64-5.4-dsi
Bart Van Assche 2019-06-28 13:07:44 -07:00 committed by Jens Axboe
parent 6728ac3396
commit 0c766e78bd
1 changed files with 6 additions and 4 deletions
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10
Documentation/block/queue-sysfs.txt
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@ -98,8 +98,9 @@ This is the maximum number of kilobytes supported in a single data transfer.
max_integrity_segments (RO)
---------------------------
When read, this file shows the max limit of integrity segments as
set by block layer which a hardware controller can handle.
Maximum number of elements in a DMA scatter/gather list with integrity
data that will be submitted by the block layer core to the associated
block driver.
max_sectors_kb (RW)
-------------------
@ -109,11 +110,12 @@ size allowed by the hardware.
max_segments (RO)
-----------------
Maximum number of segments of the device.
Maximum number of elements in a DMA scatter/gather list that is submitted
to the associated block driver.
max_segment_size (RO)
---------------------
Maximum segment size of the device.
Maximum size in bytes of a single element in a DMA scatter/gather list.
minimum_io_size (RO)
--------------------