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| author | Bart Van Assche <bvanassche@acm.org> | 2019-06-28 13:07:44 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-06-29 09:38:03 -0600 |
| commit | 0c766e78bda6d4edf40779fc0cd48d0867a04d84 (patch) | |
| tree | 00a07d6b3a565d99013694be825f56c81005b42e /Documentation/block | |
| parent | 6728ac3396265184abe93f18b32aca329981e5ce (diff) | |
| download | lwn-0c766e78bda6d4edf40779fc0cd48d0867a04d84.tar.gz lwn-0c766e78bda6d4edf40779fc0cd48d0867a04d84.zip | |
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>
Diffstat (limited to 'Documentation/block')
| -rw-r--r-- | Documentation/block/queue-sysfs.txt | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/block/queue-sysfs.txt b/Documentation/block/queue-sysfs.txt index f6da2efe2105..1515dcf3dec4 100644 --- a/Documentation/block/queue-sysfs.txt +++ b/Documentation/block/queue-sysfs.txt @@ -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) -------------------- |