Since dm core uses bio_clone_fast() for both bio-based and request-based DM device, there is no need for bvec mempool. With this patch, on arch with 4KB page for example, memory usage will be reduced by 64KB for each bio-based DM device and 1MB for each request-based DM device. Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx> --- drivers/md/dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 4210b3c..7160853 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2895,7 +2895,7 @@ struct dm_md_mempools *dm_alloc_md_mempools(unsigned type, unsigned integrity, u if (!pools->io_pool) goto out; - pools->bs = bioset_create(pool_size, front_pad); + pools->bs = bioset_nobvec_create(pool_size, front_pad); if (!pools->bs) goto out; -- 1.9.3 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
