author: Hao Xu <haoxu@linux.alibaba.com> 2021-08-08 21:54:33 +0800
committer: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2021-08-18 09:06:57 +0200
commit: 815a0fe3f415e78ae8678fc1b8864e2dc34b9091
parent: 3cedeb691b74c1c0d85a7241727ad5e62ba53b4e
Commit Summary:
Diffstat:
1 file changed, 10 insertions, 2 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c
index 77026d42cb79..2c8a9a394884 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -283,16 +283,24 @@ static void create_worker_cb(struct callback_head *cb)
struct io_wq *wq;
struct io_wqe *wqe;
struct io_wqe_acct *acct;
+ bool do_create = false;
cwd = container_of(cb, struct create_worker_data, work);
wqe = cwd->wqe;
wq = wqe->wq;
acct = &wqe->acct[cwd->index];
raw_spin_lock_irq(&wqe->lock);
- if (acct->nr_workers < acct->max_workers)
+ if (acct->nr_workers < acct->max_workers) {
acct->nr_workers++;
+ do_create = true;
+ }
raw_spin_unlock_irq(&wqe->lock);
- create_io_worker(wq, cwd->wqe, cwd->index);
+ if (do_create) {
+ create_io_worker(wq, cwd->wqe, cwd->index);
+ } else {
+ atomic_dec(&acct->nr_running);
+ io_worker_ref_put(wq);
+ }
kfree(cwd);
}