diff options
| author | Christoph Hellwig <hch@lst.de> | 2025-11-13 09:39:48 +0100 |
|---|---|---|
| committer | Vlastimil Babka <vbabka@suse.cz> | 2025-11-23 12:30:36 +0100 |
| commit | ac529d86ad26d632d3c70b7c5b839282a3294d2f (patch) | |
| tree | 66bacb04d4ae5d159e5dca688461000bd44c463a /include/linux | |
| parent | 1742d97df628de55c0df1a0eb6eefb27136ee890 (diff) | |
mempool: add mempool_{alloc,free}_bulk
Add a version of the mempool allocator that works for batch allocations
of multiple objects. Calling mempool_alloc in a loop is not safe because
it could deadlock if multiple threads are performing such an allocation
at the same time.
As an extra benefit the interface is build so that the same array can be
used for alloc_pages_bulk / release_pages so that at least for page
backed mempools the fast path can use a nice batch optimization.
Note that mempool_alloc_bulk does not take a gfp_mask argument as it
must always be able to sleep and doesn't support any non-trivial
modifiers. NOFO or NOIO constrainst must be set through the scoped API.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251113084022.1255121-8-hch@lst.de
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mempool.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mempool.h b/include/linux/mempool.h index 34941a4b9026..e914fec0e119 100644 --- a/include/linux/mempool.h +++ b/include/linux/mempool.h @@ -66,9 +66,15 @@ extern void mempool_destroy(mempool_t *pool); extern void *mempool_alloc_noprof(mempool_t *pool, gfp_t gfp_mask) __malloc; #define mempool_alloc(...) \ alloc_hooks(mempool_alloc_noprof(__VA_ARGS__)) +int mempool_alloc_bulk_noprof(struct mempool *pool, void **elem, + unsigned int count, unsigned int allocated); +#define mempool_alloc_bulk(...) \ + alloc_hooks(mempool_alloc_bulk_noprof(__VA_ARGS__)) extern void *mempool_alloc_preallocated(mempool_t *pool) __malloc; extern void mempool_free(void *element, mempool_t *pool); +unsigned int mempool_free_bulk(struct mempool *pool, void **elem, + unsigned int count); /* * A mempool_alloc_t and mempool_free_t that get the memory from |