table of contents
| SET_DMA_RESERVE(9) | Memory Management in Linux | SET_DMA_RESERVE(9) |
NAME¶
set_dma_reserve - set the specified number of pages reserved in the first zone
SYNOPSIS¶
void set_dma_reserve(unsigned long new_dma_reserve);
ARGUMENTS¶
new_dma_reserve
The number of pages to mark reserved
DESCRIPTION¶
The per-cpu batchsize and zone watermarks are determined by present_pages. In the DMA zone, a significant percentage may be consumed by kernel image and other unfreeable allocations which can skew the watermarks badly. This function may optionally be used to account for unfreeable pages in the first zone (e.g., ZONE_DMA). The effect will be lower watermarks and smaller per-cpu batchsize.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |