centos man page for set_dma_reserve

Query: set_dma_reserve

OS: centos

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

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
Kernel Hackers Manual 3.10 June 2014 SET_DMA_RESERVE(9)
Related Man Pages
malloc_create_zone(3) - mojave
malloc_zone_calloc(3) - mojave
malloc_zone_free(3) - mojave
malloc_create_zone(3) - osx
malloc_zone_valloc(3) - osx
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