blk_limits_max_hw_sectors man page on Scientific

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BLK_LIMITS_MAX_HW_SE(9)		 Block Devices	       BLK_LIMITS_MAX_HW_SE(9)

NAME
       blk_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.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013	       BLK_LIMITS_MAX_HW_SE(9)
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