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block: don't create bio_vec slabs of less than the inline number

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If we don't have CONFIG_BLK_DEV_INTEGRITY set, then we don't have
any external dependencies on the bio_vec slabs. So don't create
the ones that we will inline anyway.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2008-12-05 16:10:29 +01:00
parent 34053979fb
commit a7fcd37cdc
1 changed files with 7 additions and 0 deletions
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7
fs/bio.c
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@@ -1589,6 +1589,13 @@ static void __init biovec_init_slabs(void)
int size; int size;
struct biovec_slab *bvs = bvec_slabs + i; struct biovec_slab *bvs = bvec_slabs + i;
#ifndef CONFIG_BLK_DEV_INTEGRITY
if (bvs->nr_vecs <= BIO_INLINE_VECS) {
bvs->slab = NULL;
continue;
}
#endif
size = bvs->nr_vecs * sizeof(struct bio_vec); size = bvs->nr_vecs * sizeof(struct bio_vec);
bvs->slab = kmem_cache_create(bvs->name, size, 0, bvs->slab = kmem_cache_create(bvs->name, size, 0,
SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);