1BLK_LIMITS_MAX_HW_SE(9)          Block Devices         BLK_LIMITS_MAX_HW_SE(9)
2
3
4

NAME

6       blk_limits_max_hw_sectors - set hard and soft limit of max sectors for
7       request
8

SYNOPSIS

10       void blk_limits_max_hw_sectors(struct queue_limits * limits,
11                                      unsigned int max_hw_sectors);
12

ARGUMENTS

14       limits
15           the queue limits
16
17       max_hw_sectors
18           max hardware sectors in the usual 512b unit
19

DESCRIPTION

21       Enables a low level driver to set a hard upper limit, max_hw_sectors,
22       on the size of requests. max_hw_sectors is set by the device driver
23       based upon the combined capabilities of I/O controller and storage
24       device.
25
26       max_sectors is a soft limit imposed by the block layer for filesystem
27       type requests. This value can be overridden on a per-device basis in
28       /sys/block/<device>/queue/max_sectors_kb. The soft limit can not exceed
29       max_hw_sectors.
30

32Kernel Hackers Manual 2.6.         June 2019           BLK_LIMITS_MAX_HW_SE(9)
Impressum