limit. No highmem default.
blk_queue_max_sectors(q, max_sectors)
- Sets two variables that limit the size of the request.
-
- - The request queue's max_sectors, which is a soft size in
- in units of 512 byte sectors, and could be dynamically varied
- by the core kernel.
-
- - The request queue's max_hw_sectors, which is a hard limit
- and reflects the maximum size request a driver can handle
- in units of 512 byte sectors.
-
- The default for both max_sectors and max_hw_sectors is
- 255. The upper limit of max_sectors is 1024.
+ Maximum size request you can handle in units of 512 byte
+ sectors. 255 default.
blk_queue_max_phys_segments(q, max_segments)
Maximum physical segments you can handle in a request. 128