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bcache: Give btree_io_wq correct semantics again

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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@suse.de>
Cc: stable@vger.kernel.org # 5.4+
Signed-off-by: Kai Krakow <kai@kaishome.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kai Krakow
2021-02-10 13:07:26 +08:00
committed by Greg Kroah-Hartman
parent de5510b982
commit a339f0998e
1 changed files with 1 additions and 1 deletions
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drivers/md/bcache/btree.c
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@ -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;