set_dma_reserve man page on Scientific

set_dma_reserve man page on Scientific

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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 2.6.	 November 2013		    SET_DMA_RESERVE(9)

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