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block: don't allocate inline bvecs if this bioset needn't bvecs

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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>
This commit is contained in:
Ming Lei
2021-01-11 11:05:54 +08:00
committed by Jens Axboe
parent c495a17679
commit 9f180e315a
2 changed files with 6 additions and 2 deletions
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include/linux/bio.h
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@@ -703,6 +703,7 @@ struct bio_set {
mempool_t bvec_integrity_pool;
#endif
unsigned int back_pad;
/*
* Deadlock avoidance for stacking block drivers: see comments in
* bio_alloc_bioset() for details