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| author | Keith Busch <kbusch@kernel.org> | 2023-01-05 12:51:46 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-01-29 15:18:33 -0700 |
| commit | c9c77418a98273fe96835c42666f7427b3883f48 (patch) | |
| tree | ab45a1f2d1e3491b68a6baf62661e7ca4f2f68a8 /Documentation/ABI/stable | |
| parent | 0a26f327e46c203229e72c823dfec71a2b405ec5 (diff) | |
| download | linux-stable-c9c77418a98273fe96835c42666f7427b3883f48.tar.gz linux-stable-c9c77418a98273fe96835c42666f7427b3883f48.tar.bz2 linux-stable-c9c77418a98273fe96835c42666f7427b3883f48.zip | |
block: save user max_sectors limit
The user can set the max_sectors limit to any valid value via sysfs
/sys/block/<dev>/queue/max_sectors_kb attribute. If the device limits
are ever rescanned, though, the limit reverts back to the potentially
artificially low BLK_DEF_MAX_SECTORS value.
Preserve the user's setting as the max_sectors limit as long as it's
valid. The user can reset back to defaults by writing 0 to the sysfs
file.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20230105205146.3610282-3-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'Documentation/ABI/stable')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-block | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index cd14ecb3c9a5..ac1e519272aa 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -432,7 +432,8 @@ Contact: linux-block@vger.kernel.org Description: [RW] This is the maximum number of kilobytes that the block layer will allow for a filesystem request. Must be smaller than - or equal to the maximum size allowed by the hardware. + or equal to the maximum size allowed by the hardware. Write 0 + to use default kernel settings. What: /sys/block/<disk>/queue/max_segment_size |