1SET_DMA_RESERVE(9)        Memory Management in Linux        SET_DMA_RESERVE(9)
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NAME

6       set_dma_reserve - set the specified number of pages reserved in the
7       first zone
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SYNOPSIS

10       void set_dma_reserve(unsigned long new_dma_reserve);
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ARGUMENTS

13       new_dma_reserve
14           The number of pages to mark reserved
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DESCRIPTION

17       The per-cpu batchsize and zone watermarks are determined by
18       present_pages. In the DMA zone, a significant percentage may be
19       consumed by kernel image and other unfreeable allocations which can
20       skew the watermarks badly. This function may optionally be used to
21       account for unfreeable pages in the first zone (e.g., ZONE_DMA). The
22       effect will be lower watermarks and smaller per-cpu batchsize.
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25Kernel Hackers Manual 2.6.         June 2019                SET_DMA_RESERVE(9)
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