BLK_QUEUE_BOUNCE_LIM(9) Block Devices BLK_QUEUE_BOUNCE_LIM(9) NAME blk_queue_bounce_limit - set bounce buffer limit for queue SYNOPSIS void blk_queue_bounce_limit(struct request_queue * q, u64 dma_mask); ARGUMENTS q the request queue for the device dma_mask the maximum address the device can handle DESCRIPTION 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 dma_mask. COPYRIGHT Kernel Hackers Manual 2.6. November 2013 BLK_QUEUE_BOUNCE_LIM(9)[top]
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