table of contents
other versions
- wheezy 3.2.78-1
BLK_QUEUE_BOUNCE_LIM(9) | Block Devices | BLK_QUEUE_BOUNCE_LIM(9) |
NAME¶
blk_queue_bounce_limit - set bounce buffer limit for queueSYNOPSIS¶
void
blk_queue_bounce_limit(struct request_queue * q,
u64 dma_mask);
ARGUMENTS¶
qthe 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¶
March 2016 | Kernel Hackers Manual 3.2. |