FREE_AREA_INIT_NODES - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Memory Management in Linux

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NAMEfree_area_init_nodes − Initialise all pg_data_t and zone data

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SYNOPSISvoid free_area_init_nodes(unsigned long * max_zone_pfn);

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ARGUMENTSmax_zone_pfn an array of max PFNs for each zone

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DESCRIPTIONThis will call free_area_init_node for each active node in the system​. Using the page ranges provided by add_active_range, the size of each zone in each node and their holes is calculated​. If the maximum PFN between two adjacent zones match, it is assumed that the zone is empty​. For example, if arch_max_dma_pfn == arch_max_dma32_pfn, it is assumed that arch_max_dma32_pfn has no pages​. It is also assumed that a zone starts where the previous one ended​. For example, ZONE_DMA32 starts at arch_max_dma_pfn​.

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