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block: reuse BIO_INLINE_VECS for integrity bvecs

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bvec_alloc always uses biovec_slabs, and thus always needs to use the
same number of inline vecs.  Share a single definition for the data
and integrity bvecs.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-02-02 18:19:19 +01:00 committed by Jens Axboe
parent 8358c28a5d
commit dc0b8a57ad
3 changed files with 3 additions and 10 deletions
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6
block/bio-integrity.c
View File

@ -14,8 +14,6 @@
#include <linux/slab.h>
#include "blk.h"
#define BIP_INLINE_VECS 4
static struct kmem_cache *bip_slab;
static struct workqueue_struct *kintegrityd_wq;
@ -63,7 +61,7 @@ struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio,
inline_vecs = nr_vecs;
} else {
bip = mempool_alloc(&bs->bio_integrity_pool, gfp_mask);
inline_vecs = BIP_INLINE_VECS;
inline_vecs = BIO_INLINE_VECS;
}
if (unlikely(!bip))
@ -470,6 +468,6 @@ void __init bio_integrity_init(void)
bip_slab = kmem_cache_create("bio_integrity_payload",
sizeof(struct bio_integrity_payload) +
sizeof(struct bio_vec) * BIP_INLINE_VECS,
sizeof(struct bio_vec) * BIO_INLINE_VECS,
0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
}

6
block/bio.c
View File

@ -25,12 +25,6 @@
#include "blk.h"
#include "blk-rq-qos.h"
/*
* Test patch to inline a certain number of bi_io_vec's inside the bio
* itself, to shrink a bio data allocation from two mempool calls to one
*/
#define BIO_INLINE_VECS 4
/*
* if you change this list, also change bvec_alloc or things will
* break badly! cannot be bigger than what you can fit into an

1
block/blk.h
View File

@ -55,6 +55,7 @@ void blk_free_flush_queue(struct blk_flush_queue *q);
void blk_freeze_queue(struct request_queue *q);
#define BIO_INLINE_VECS 4
struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *);
void bvec_free(mempool_t *, struct bio_vec *, unsigned int);
unsigned int bvec_nr_vecs(unsigned short idx);