table of contents
| 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¶
| May 2024 | Kernel Hackers Manual 2.6. |