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

6       alloc_contig_range - - tries to allocate given range of pages
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SYNOPSIS

9       int alloc_contig_range(unsigned long start, unsigned long end,
10                              unsigned migratetype);
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ARGUMENTS

13       start
14           start PFN to allocate
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16       end
17           one-past-the-last PFN to allocate
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19       migratetype
20           migratetype of the underlaying pageblocks (either #MIGRATE_MOVABLE
21           or #MIGRATE_CMA). All pageblocks in range must have the same
22           migratetype and it must be either of the two.
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DESCRIPTION

25       The PFN range does not have to be pageblock or MAX_ORDER_NR_PAGES
26       aligned, however it's the caller's responsibility to guarantee that we
27       are the only thread that changes migrate type of pageblocks the pages
28       fall in.
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30       The PFN range must belong to a single zone.
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32       Returns zero on success or negative error code. On success all pages
33       which PFN is in [start, end) are allocated for the caller and need to
34       be freed with free_contig_range.
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37Kernel Hackers Manual 3.10         June 2019             ALLOC_CONTIG_RANGE(9)
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