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author | Kent Overstreet <kent.overstreet@gmail.com> | 2018-05-08 21:33:50 -0400 |
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committer | Jens Axboe <axboe@kernel.dk> | 2018-05-14 13:16:03 -0600 |
commit | 8aa6ba2f6e3deaff70e517e3cfbf38d1105f9d4f (patch) | |
tree | a2b42e3b8fb2f7671a08c6e0a63d1dd6752f1765 /block/bio.c | |
parent | c1a67fefd0546a5552289c65fe31b1d60e64b643 (diff) | |
download | linux-stable-8aa6ba2f6e3deaff70e517e3cfbf38d1105f9d4f.tar.gz linux-stable-8aa6ba2f6e3deaff70e517e3cfbf38d1105f9d4f.tar.bz2 linux-stable-8aa6ba2f6e3deaff70e517e3cfbf38d1105f9d4f.zip |
block: Convert bio_set to mempool_init()
Minor performance improvement by getting rid of pointer indirections
from allocation/freeing fastpaths.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
-rw-r--r-- | block/bio.c | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/block/bio.c b/block/bio.c index 53e0f0a1ed94..06df6cf2ed8c 100644 --- a/block/bio.c +++ b/block/bio.c @@ -254,7 +254,7 @@ static void bio_free(struct bio *bio) bio_uninit(bio); if (bs) { - bvec_free(bs->bvec_pool, bio->bi_io_vec, BVEC_POOL_IDX(bio)); + bvec_free(&bs->bvec_pool, bio->bi_io_vec, BVEC_POOL_IDX(bio)); /* * If we have front padding, adjust the bio pointer before freeing @@ -262,7 +262,7 @@ static void bio_free(struct bio *bio) p = bio; p -= bs->front_pad; - mempool_free(p, bs->bio_pool); + mempool_free(p, &bs->bio_pool); } else { /* Bio was allocated by bio_kmalloc() */ kfree(bio); @@ -454,7 +454,8 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, unsigned int nr_iovecs, inline_vecs = nr_iovecs; } else { /* should not use nobvec bioset for nr_iovecs > 0 */ - if (WARN_ON_ONCE(!bs->bvec_pool && nr_iovecs > 0)) + if (WARN_ON_ONCE(!mempool_initialized(&bs->bvec_pool) && + nr_iovecs > 0)) return NULL; /* * generic_make_request() converts recursion to iteration; this @@ -483,11 +484,11 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, unsigned int nr_iovecs, bs->rescue_workqueue) gfp_mask &= ~__GFP_DIRECT_RECLAIM; - p = mempool_alloc(bs->bio_pool, gfp_mask); + p = mempool_alloc(&bs->bio_pool, gfp_mask); if (!p && gfp_mask != saved_gfp) { punt_bios_to_rescuer(bs); gfp_mask = saved_gfp; - p = mempool_alloc(bs->bio_pool, gfp_mask); + p = mempool_alloc(&bs->bio_pool, gfp_mask); } front_pad = bs->front_pad; @@ -503,11 +504,11 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, unsigned int nr_iovecs, if (nr_iovecs > inline_vecs) { unsigned long idx = 0; - bvl = bvec_alloc(gfp_mask, nr_iovecs, &idx, bs->bvec_pool); + bvl = bvec_alloc(gfp_mask, nr_iovecs, &idx, &bs->bvec_pool); if (!bvl && gfp_mask != saved_gfp) { punt_bios_to_rescuer(bs); gfp_mask = saved_gfp; - bvl = bvec_alloc(gfp_mask, nr_iovecs, &idx, bs->bvec_pool); + bvl = bvec_alloc(gfp_mask, nr_iovecs, &idx, &bs->bvec_pool); } if (unlikely(!bvl)) @@ -524,7 +525,7 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, unsigned int nr_iovecs, return bio; err_free: - mempool_free(p, bs->bio_pool); + mempool_free(p, &bs->bio_pool); return NULL; } EXPORT_SYMBOL(bio_alloc_bioset); @@ -1848,11 +1849,11 @@ EXPORT_SYMBOL_GPL(bio_trim); * create memory pools for biovec's in a bio_set. * use the global biovec slabs created for general use. */ -mempool_t *biovec_create_pool(int pool_entries) +int biovec_init_pool(mempool_t *pool, int pool_entries) { struct biovec_slab *bp = bvec_slabs + BVEC_POOL_MAX; - return mempool_create_slab_pool(pool_entries, bp->slab); + return mempool_init_slab_pool(pool, pool_entries, bp->slab); } void bioset_free(struct bio_set *bs) @@ -1860,8 +1861,8 @@ void bioset_free(struct bio_set *bs) if (bs->rescue_workqueue) destroy_workqueue(bs->rescue_workqueue); - mempool_destroy(bs->bio_pool); - mempool_destroy(bs->bvec_pool); + mempool_exit(&bs->bio_pool); + mempool_exit(&bs->bvec_pool); bioset_integrity_free(bs); bio_put_slab(bs); @@ -1913,15 +1914,12 @@ struct bio_set *bioset_create(unsigned int pool_size, return NULL; } - bs->bio_pool = mempool_create_slab_pool(pool_size, bs->bio_slab); - if (!bs->bio_pool) + if (mempool_init_slab_pool(&bs->bio_pool, pool_size, bs->bio_slab)) goto bad; - if (flags & BIOSET_NEED_BVECS) { - bs->bvec_pool = biovec_create_pool(pool_size); - if (!bs->bvec_pool) - goto bad; - } + if ((flags & BIOSET_NEED_BVECS) && + biovec_init_pool(&bs->bvec_pool, pool_size)) + goto bad; if (!(flags & BIOSET_NEED_RESCUER)) return bs; |