There should be this judgement before we create an io-worker
Fixes: 685fe7feedb9 ("io-wq: eliminate the need for a manager thread")
Signed-off-by: Hao Xu <haoxu@xxxxxxxxxxxxxxxxx>
---
fs/io-wq.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/io-wq.c b/fs/io-wq.c
index 88d0ba7be1fb..b7cc31f96fdb 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -276,9 +276,17 @@ static void create_worker_cb(struct callback_head *cb)
{
struct create_worker_data *cwd;
struct io_wq *wq;
+ struct io_wqe *wqe;
+ struct io_wqe_acct *acct;
cwd = container_of(cb, struct create_worker_data, work);
- wq = cwd->wqe->wq;
+ wqe = cwd->wqe;
+ wq = wqe->wq;
+ acct = &wqe->acct[cwd->index];
+ raw_spin_lock_irq(&wqe->lock);
+ if (acct->nr_workers < acct->max_workers)
+ acct->nr_workers++;
+ raw_spin_unlock_irq(&wqe->lock);
create_io_worker(wq, cwd->wqe, cwd->index);
kfree(cwd);
}
--
2.24.4
