Function report |
Source Code:mm\compaction.c |
Create Date:2022-07-28 14:30:33 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:Compaction requires the taking of some coarse locks that are potentially* very heavily contended. For async compaction, trylock and record if the* lock is contended. The lock will still be acquired but compaction will
Proto:static bool compact_lock_irqsave(spinlock_t *lock, unsigned long *flags, struct compact_control *cc)
Type:bool
Parameter:
Type | Parameter | Name |
---|---|---|
spinlock_t * | lock | |
unsigned long * | flags | |
struct compact_control * | cc |
486 | If Async or sync migration mode == MIGRATE_ASYNC && Not Signal lock or sched contention Then |
487 | If spin_trylock_irqsave(lock, * flags) Then Return true |
490 | Signal lock or sched contention = true |
493 | spin_lock_irqsave(lock, * flags) |
494 | Return true |
Name | Describe |
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isolate_freepages_block | Isolate free pages onto a private freelist. If @strict is true, will abort* returning 0 on any invalid PFNs or non-free pages inside of the pageblock* (even though it may still end up isolating some pages). |
isolate_migratepages_block | solate_migratepages_block() - isolate all migrate-able pages within* a single pageblock*@cc: Compaction control structure.*@low_pfn: The first PFN to isolate*@end_pfn: The one-past-the-last PFN to isolate, within same pageblock |
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