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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#ifndef _LINUX_MMZONE_H
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#define _LINUX_MMZONE_H
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/wait.h>
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#include <linux/bitops.h>
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#include <linux/atomic.h>
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/* Free memory management - zoned buddy allocator. */
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#ifndef CONFIG_FORCE_MAX_ZONEORDER
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#define MAX_ORDER 11
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#else
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#define MAX_ORDER CONFIG_FORCE_MAX_ZONEORDER
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#endif
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#define MAX_ORDER_NR_PAGES (1 << (MAX_ORDER - 1))
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/*
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* PAGE_ALLOC_COSTLY_ORDER is the order at which allocations are deemed
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* costly to service. That is between allocation orders which should
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* coalesce naturally under reasonable reclaim pressure and those which
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* will not.
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*/
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#define PAGE_ALLOC_COSTLY_ORDER 3
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enum {
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MIGRATE_UNMOVABLE,
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MIGRATE_MOVABLE,
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MIGRATE_RECLAIMABLE,
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MIGRATE_PCPTYPES, /* the number of types on the pcp lists */
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MIGRATE_HIGHATOMIC = MIGRATE_PCPTYPES,
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#ifdef CONFIG_CMA
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/*
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* MIGRATE_CMA migration type is designed to mimic the way
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* ZONE_MOVABLE works. Only movable pages can be allocated
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* from MIGRATE_CMA pageblocks and page allocator never
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* implicitly change migration type of MIGRATE_CMA pageblock.
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*
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* The way to use it is to change migratetype of a range of
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* pageblocks to MIGRATE_CMA which can be done by
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* __free_pageblock_cma() function. What is important though
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* is that a range of pageblocks must be aligned to
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* MAX_ORDER_NR_PAGES should biggest page be bigger then
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* a single pageblock.
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*/
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MIGRATE_CMA,
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#endif
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#ifdef CONFIG_MEMORY_ISOLATION
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MIGRATE_ISOLATE, /* can't allocate from here */
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#endif
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MIGRATE_TYPES
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};
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#endif /* _LINUX_MMZONE_H */
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