dm-bufio: fix slab cache attributes The I/O buffer doesn't have to be aligned, so we can drop the alignment on the slab cache. This patch also sets SLAB_RECLAIM_ACCOUNT, so that the memory allocated from the cache is accounted as reclaimable and doesn't inflate the 'used' entry in the free command. Signed-off-by: Mikulas Patocka --- drivers/md/dm-bufio.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) Index: linux-2.6/drivers/md/dm-bufio.c =================================================================== --- linux-2.6.orig/drivers/md/dm-bufio.c 2018-03-14 12:28:01.239999000 +0100 +++ linux-2.6/drivers/md/dm-bufio.c 2018-03-14 12:49:08.559999000 +0100 @@ -618,7 +618,6 @@ static void use_inline_bio(struct dm_buf unsigned this_step = min((unsigned)(PAGE_SIZE - offset_in_page(ptr)), len); if (!bio_add_page(&b->bio, virt_to_page(ptr), this_step, offset_in_page(ptr))) { - BUG_ON(b->c->block_size <= PAGE_SIZE); use_dmio(b, rw, sector, n_sectors, offset, end_io); return; } @@ -1686,7 +1685,7 @@ struct dm_bufio_client *dm_bufio_client_ if (block_size < PAGE_SIZE) { char name[26]; snprintf(name, sizeof name, "dm_bufio_cache-%u", c->block_size); - c->slab_cache = kmem_cache_create(name, c->block_size, c->block_size, 0, NULL); + c->slab_cache = kmem_cache_create(name, c->block_size, 0, SLAB_RECLAIM_ACCOUNT, NULL); if (!c->slab_cache) { r = -ENOMEM; goto bad;