void blk_queue_bounce_limit (request_queue_t * q, u64 dma_addr);
Different hardware can have different requirements as to what pages it can do I/O directly to. A low level driver can call blk_queue_bounce_limit to have lower memory pages allocated as bounce buffers for doing I/O to pages residing above page. By default the block layer sets this to the highest numbered ``low'' memory page.
This documentation was generated with kernel version 2.6.1.