io-wq: reduce acct->lock crossing functions lock/unlock
reduce acct->lock lock and unlock in different functions to make the code clearer. Signed-off-by: Hao Xu <haoxu@linux.alibaba.com> Link: https://lore.kernel.org/r/20220206095241.121485-3-haoxu@linux.alibaba.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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32
fs/io-wq.c
32
fs/io-wq.c
@ -239,10 +239,15 @@ static void io_worker_exit(struct io_worker *worker)
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static inline bool io_acct_run_queue(struct io_wqe_acct *acct)
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{
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bool ret = false;
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raw_spin_lock(&acct->lock);
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if (!wq_list_empty(&acct->work_list) &&
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!test_bit(IO_ACCT_STALLED_BIT, &acct->flags))
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return true;
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return false;
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ret = true;
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raw_spin_unlock(&acct->lock);
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return ret;
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}
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/*
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@ -395,13 +400,9 @@ static void io_wqe_dec_running(struct io_worker *worker)
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if (!atomic_dec_and_test(&acct->nr_running))
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return;
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raw_spin_lock(&wqe->lock);
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if (!io_acct_run_queue(acct)) {
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raw_spin_unlock(&wqe->lock);
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if (!io_acct_run_queue(acct))
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return;
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}
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raw_spin_unlock(&wqe->lock);
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atomic_inc(&acct->nr_running);
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atomic_inc(&wqe->wq->worker_refs);
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io_queue_worker_create(worker, acct, create_worker_cb);
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@ -544,7 +545,6 @@ static void io_assign_current_work(struct io_worker *worker,
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static void io_wqe_enqueue(struct io_wqe *wqe, struct io_wq_work *work);
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static void io_worker_handle_work(struct io_worker *worker)
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__releases(acct->lock)
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{
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struct io_wqe_acct *acct = io_wqe_get_acct(worker);
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struct io_wqe *wqe = worker->wqe;
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@ -561,6 +561,7 @@ static void io_worker_handle_work(struct io_worker *worker)
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* can't make progress, any work completion or insertion will
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* clear the stalled flag.
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*/
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raw_spin_lock(&acct->lock);
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work = io_get_next_work(acct, worker);
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raw_spin_unlock(&acct->lock);
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if (work) {
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@ -614,8 +615,6 @@ static void io_worker_handle_work(struct io_worker *worker)
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wake_up(&wq->hash->wait);
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}
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} while (work);
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raw_spin_lock(&acct->lock);
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} while (1);
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}
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@ -639,14 +638,9 @@ static int io_wqe_worker(void *data)
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long ret;
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set_current_state(TASK_INTERRUPTIBLE);
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loop:
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raw_spin_lock(&acct->lock);
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if (io_acct_run_queue(acct)) {
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while (io_acct_run_queue(acct))
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io_worker_handle_work(worker);
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goto loop;
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} else {
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raw_spin_unlock(&acct->lock);
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}
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raw_spin_lock(&wqe->lock);
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/* timed out, exit unless we're the last worker */
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if (last_timeout && acct->nr_workers > 1) {
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@ -671,10 +665,8 @@ loop:
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last_timeout = !ret;
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}
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if (test_bit(IO_WQ_BIT_EXIT, &wq->state)) {
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raw_spin_lock(&acct->lock);
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if (test_bit(IO_WQ_BIT_EXIT, &wq->state))
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io_worker_handle_work(worker);
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}
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audit_free(current);
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io_worker_exit(worker);
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