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 <mpatocka@xxxxxxxxxx>
---
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 2018-03-21 12:33:34.928416000 +0100
+++ linux-2.6/drivers/md/dm-bufio.c 2018-03-21 12:35:14.938416000 +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, ARCH_KMALLOC_MINALIGN, SLAB_RECLAIM_ACCOUNT, NULL);
if (!c->slab_cache) {
r = -ENOMEM;
goto bad;
--
dm-devel mailing list
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
