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| author |   Ming Lei <ming.lei@redhat.com> | 2021-01-11 11:05:54 +0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-01-24 21:22:45 -0700 |
| commit | 9f180e315a93cde559ac1c9c4c5ce980aa681c1c (patch) | |
| tree | a1469d03fead5c762d84d3b64f416fd34cd0aa33 /block | |
| parent | block: don't pass BIOSET_NEED_BVECS for q->bio_split (diff) | |
| download | linux-dev-9f180e315a93cde559ac1c9c4c5ce980aa681c1c.tar.xz linux-dev-9f180e315a93cde559ac1c9c4c5ce980aa681c1c.zip | |
block: don't allocate inline bvecs if this bioset needn't bvecs
The inline bvecs won't be used if user needn't bvecs by not passing
BIOSET_NEED_BVECS, so don't allocate bvecs in this situation.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Tested-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/bio.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/block/bio.c b/block/bio.c index 87bf16460e0e..8ccda51dd831 100644 --- a/block/bio.c +++ b/block/bio.c @@ -89,8 +89,7 @@ fail_alloc_slab: static inline unsigned int bs_bio_slab_size(struct bio_set *bs) { - return bs->front_pad + sizeof(struct bio) + - BIO_INLINE_VECS * sizeof(struct bio_vec); + return bs->front_pad + sizeof(struct bio) + bs->back_pad; } static struct kmem_cache *bio_find_or_create_slab(struct bio_set *bs) @@ -1563,6 +1562,10 @@ int bioset_init(struct bio_set *bs, int flags) { bs->front_pad = front_pad; + if (flags & BIOSET_NEED_BVECS) + bs->back_pad = BIO_INLINE_VECS * sizeof(struct bio_vec); + else + bs->back_pad = 0; spin_lock_init(&bs->rescue_lock); bio_list_init(&bs->rescue_list); |