From b6279f82eb11a1f380af3a26acf921c37505fc86 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Mon, 27 Mar 2023 14:30:46 -0400 Subject: [PATCH] dm bio prison v1: intelligently size dm_bio_prison's prison_regions Size the dm_bio_prison's number of prison_region structs using dm_num_hash_locks(). Signed-off-by: Mike Snitzer --- drivers/md/dm-bio-prison-v1.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/md/dm-bio-prison-v1.c b/drivers/md/dm-bio-prison-v1.c index a7930ad..6b726b8 100644 --- a/drivers/md/dm-bio-prison-v1.c +++ b/drivers/md/dm-bio-prison-v1.c @@ -16,7 +16,6 @@ /*----------------------------------------------------------------*/ -#define NR_LOCKS 64 #define MIN_CELLS 1024 struct prison_region { @@ -27,7 +26,7 @@ struct prison_region { struct dm_bio_prison { mempool_t cell_pool; unsigned int num_locks; - struct prison_region regions[NR_LOCKS]; + struct prison_region regions[]; }; static struct kmem_cache *_cell_cache; @@ -41,12 +40,14 @@ static struct kmem_cache *_cell_cache; struct dm_bio_prison *dm_bio_prison_create(void) { int ret; - unsigned i; - struct dm_bio_prison *prison = kzalloc(sizeof(*prison), GFP_KERNEL); + unsigned int i, num_locks; + struct dm_bio_prison *prison; + num_locks = dm_num_hash_locks(); + prison = kzalloc(struct_size(prison, regions, num_locks), GFP_KERNEL); if (!prison) return NULL; - prison->num_locks = NR_LOCKS; + prison->num_locks = num_locks; for (i = 0; i < prison->num_locks; i++) { spin_lock_init(&prison->regions[i].lock); -- 2.7.4