lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

block: Create bip slabs with embedded integrity vectors

Browse Source 
This patch restores stacking ability to the block layer integrity
infrastructure by creating a set of dedicated bip slabs.  Each bip slab
has an embedded bio_vec array at the end.  This cuts down on memory
allocations and also simplifies the code compared to the original bvec
version.  Only the largest bip slab is backed by a mempool.  The pool is
contained in the bio_set so stacking drivers can ensure forward
progress.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@carl.(none)>
This commit is contained in:
Martin K. Petersen
2009-06-26 15:37:49 +02:00
committed by Jens Axboe
parent 6118b70b3a
commit 7878cba9f0
5 changed files with 162 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/md/dm.c
View File

@ -1017,7 +1017,7 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector,
clone->bi_flags |= 1 << BIO_CLONED;
if (bio_integrity(bio)) {
bio_integrity_clone(clone, bio, GFP_NOIO);
bio_integrity_clone(clone, bio, GFP_NOIO, bs);
bio_integrity_trim(clone,
bio_sector_offset(bio, idx, offset), len);
}
@ -1045,7 +1045,7 @@ static struct bio *clone_bio(struct bio *bio, sector_t sector,
clone->bi_flags &= ~(1 << BIO_SEG_VALID);
if (bio_integrity(bio)) {
bio_integrity_clone(clone, bio, GFP_NOIO);
bio_integrity_clone(clone, bio, GFP_NOIO, bs);
if (idx != bio->bi_idx || clone->bi_size < bio->bi_size)
bio_integrity_trim(clone,