From a339f0998eb1b06606a794ff37957b1d1d13311d Mon Sep 17 00:00:00 2001 From: Kai Krakow Date: Wed, 10 Feb 2021 13:07:26 +0800 Subject: [PATCH] bcache: Give btree_io_wq correct semantics again 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 Cc: stable@vger.kernel.org # 5.4+ Signed-off-by: Kai Krakow Signed-off-by: Coly Li Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/md/bcache/btree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 1108460880fdb..5a33910aea788 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -2670,7 +2670,7 @@ 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;