Function report |
Source Code:mm\mempool.c |
Create Date:2022-07-28 14:04:46 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:mempool_alloc - allocate an element from a specific memory pool*@pool: pointer to the memory pool which was allocated via* mempool_create().*@gfp_mask: the usual allocation bitmask.* this function only sleeps if the alloc_fn() function sleeps or
Proto:void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask)
Type:void
Parameter:
Type | Parameter | Name |
---|---|---|
mempool_t * | pool | |
gfp_t | gfp_mask |
382 | VM_WARN_ON_ONCE(gfp_mask & __GFP_ZERO) |
383 | might_sleep_if(gfp_mask & Caller can reclaim ) |
385 | gfp_mask |= __GFP_NOMEMALLOC |
386 | gfp_mask |= __GFP_NORETRY |
391 | repeat_alloc : |
394 | If Value is more likely to compile time(element != NULL) Then Return element |
397 | spin_lock_irqsave( & lock, flags) |
399 | element = remove_element(pool) |
400 | spin_unlock_irqrestore( & lock, flags) |
402 | smp_wmb() |
408 | Return element |
422 | If Not (gfp_mask & Caller can reclaim ) Then |
423 | spin_unlock_irqrestore( & lock, flags) |
424 | Return NULL |
431 | spin_unlock_irqrestore( & lock, flags) |
440 | Go to repeat_alloc |
Name | Describe |
---|---|
sg_pool_alloc | |
bio_alloc_bioset | _alloc_bioset - allocate a bio for I/O*@gfp_mask: the GFP_* mask given to the slab allocator*@nr_iovecs: number of iovecs to pre-allocate*@bs: the bio_set to allocate from |
__blk_queue_bounce | |
bio_integrity_alloc | _integrity_alloc - Allocate integrity payload and attach it to bio*@bio: bio to attach integrity metadata to*@gfp_mask: Memory allocation mask*@nr_vecs: Number of integrity metadata scatter-gather elements* Description: This function prepares a bio for |
btree_node_alloc |
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