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block: rename and document BLK_DEF_MAX_SECTORS

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Give BLK_DEF_MAX_SECTORS a _CAP postfix and document what it is used for.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20231227092305.279567-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2023-12-27 09:23:05 +00:00
committed by Jens Axboe
parent 3d77976c3a
commit d6b9f4e6f7
4 changed files with 11 additions and 4 deletions
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9
include/linux/blkdev.h
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@@ -1056,7 +1056,14 @@ enum blk_default_limits {
BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL,
};
#define BLK_DEF_MAX_SECTORS 2560u
/*
* Default upper limit for the software max_sectors limit used for
* regular file system I/O. This can be increased through sysfs.
*
* Not to be confused with the max_hw_sector limit that is entirely
* controlled by the driver, usually based on hardware limits.
*/
#define BLK_DEF_MAX_SECTORS_CAP 2560u
static inline unsigned long queue_segment_boundary(const struct request_queue *q)
{