From: Kai Krakow <kai@xxxxxxxxxxx>
commit d797bd9897e3559eb48d68368550d637d32e468c upstream.
Before killing `btree_io_wq`, the queue was allocated using
`create_singlethread_workqueue()` which has `WQ_MEM_RECLAIM`. After
killing it, it no longer had this property but `system_wq` is not
single threaded.
Let's combine both worlds and make it multi threaded but able to
reclaim memory.
Cc: Coly Li <colyli@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 5.4+
Signed-off-by: Kai Krakow <kai@xxxxxxxxxxx>
Signed-off-by: Coly Li <colyli@xxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/bcache/btree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -2775,7 +2775,7 @@ void bch_btree_exit(void)
int __init bch_btree_init(void)
{
- btree_io_wq = create_singlethread_workqueue("bch_btree_io");
+ btree_io_wq = alloc_workqueue("bch_btree_io", WQ_MEM_RECLAIM, 0);
if (!btree_io_wq)
return -ENOMEM;
