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mempool: introduce mempool_is_saturated

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Introduce a helper mempool_is_saturated(), which tells if the mempool is
under-filled or not. We need it to figure out whether it should be
freed right into the mempool or could be cached with top level caches.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/636aed30be8c35d78f45e244998bc6209283cccc.1667384020.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2022-11-02 15:18:19 +00:00 committed by Jens Axboe
parent 5626196a5a
commit 6e4068a114
1 changed files with 5 additions and 0 deletions
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5
include/linux/mempool.h
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@ -30,6 +30,11 @@ static inline bool mempool_initialized(mempool_t *pool)
return pool->elements != NULL;
}
static inline bool mempool_is_saturated(mempool_t *pool)
{
return READ_ONCE(pool->curr_nr) >= pool->min_nr;
}
void mempool_exit(mempool_t *pool);
int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
mempool_free_t *free_fn, void *pool_data,