dm: ensure bio-based DM's bioset and io_pool support targets' maximum IOs
alloc_multiple_bios() assumes it can allocate the requested number of
bios but until now there was no gaurantee that the mempools would be
accomodating.
Suggested-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index aaffd0c..7b22cc8 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1079,7 +1079,8 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
{
enum dm_queue_mode type = dm_table_get_type(t);
unsigned per_io_data_size = 0;
- struct dm_target *tgt;
+ unsigned min_pool_size = 0;
+ struct dm_target *ti;
unsigned i;
if (unlikely(type == DM_TYPE_NONE)) {
@@ -1089,11 +1090,13 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
if (__table_type_bio_based(type))
for (i = 0; i < t->num_targets; i++) {
- tgt = t->targets + i;
- per_io_data_size = max(per_io_data_size, tgt->per_io_data_size);
+ ti = t->targets + i;
+ per_io_data_size = max(per_io_data_size, ti->per_io_data_size);
+ min_pool_size = max(min_pool_size, ti->num_flush_bios);
}
- t->mempools = dm_alloc_md_mempools(md, type, t->integrity_supported, per_io_data_size);
+ t->mempools = dm_alloc_md_mempools(md, type, t->integrity_supported,
+ per_io_data_size, min_pool_size);
if (!t->mempools)
return -ENOMEM;
