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authorMartin K. Petersen <martin.petersen@oracle.com>2011-03-17 11:11:05 +0100
committerJens Axboe <jaxboe@fusionio.com>2011-03-17 11:11:05 +0100
commita91a2785b200864aef2270ed6a3babac7a253a20 (patch)
tree3d21d7ef82ddabbdbfb74499d68a73f15adc819f /fs/bio-integrity.c
parent82f04ab47e1d94d78503591a7460b2cad9601ede (diff)
downloadlinux-a91a2785b200864aef2270ed6a3babac7a253a20.tar.gz
block: Require subsystems to explicitly allocate bio_set integrity mempool
MD and DM create a new bio_set for every metadevice. Each bio_set has an integrity mempool attached regardless of whether the metadevice is capable of passing integrity metadata. This is a waste of memory. Instead we defer the allocation decision to MD and DM since we know at metadevice creation time whether integrity passthrough is needed or not. Automatic integrity mempool allocation can then be removed from bioset_create() and we make an explicit integrity allocation for the fs_bio_set. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Reported-by: Zdenek Kabelac <zkabelac@redhat.com> Acked-by: Mike Snitzer <snizer@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/bio-integrity.c')
-rw-r--r--fs/bio-integrity.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index e49cce234c6..9c5e6b2cd11 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -761,6 +761,9 @@ int bioset_integrity_create(struct bio_set *bs, int pool_size)
{
unsigned int max_slab = vecs_to_idx(BIO_MAX_PAGES);
+ if (bs->bio_integrity_pool)
+ return 0;
+
bs->bio_integrity_pool =
mempool_create_slab_pool(pool_size, bip_slab[max_slab].slab);