BLK_LIMITS_MAX_HW_SE(9) Block Devices BLK_LIMITS_MAX_HW_SE(9)NAMEblk_limits_max_hw_sectors - set hard and soft limit of max sectors for
request
SYNOPSIS
void blk_limits_max_hw_sectors(struct queue_limits * limits,
unsigned int max_hw_sectors);
ARGUMENTS
limits
the queue limits
max_hw_sectors
max hardware sectors in the usual 512b unit
DESCRIPTION
Enables a low level driver to set a hard upper limit, max_hw_sectors,
on the size of requests. max_hw_sectors is set by the device driver
based upon the combined capabilities of I/O controller and storage
device.
max_sectors is a soft limit imposed by the block layer for filesystem
type requests. This value can be overridden on a per-device basis in
/sys/block/<device>/queue/max_sectors_kb. The soft limit can not exceed
max_hw_sectors.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 BLK_LIMITS_MAX_HW_SE(9)