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io-wq: move nr_running and worker_refs out of wqe->lock protection
We don't need to protect nr_running and worker_refs by wqe->lock, so narrow the range of raw_spin_lock_irq - raw_spin_unlock_irq Signed-off-by: Hao Xu <haoxu@linux.alibaba.com> Link: https://lore.kernel.org/r/20210810125554.99229-1-haoxu@linux.alibaba.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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1 changed files with 4 additions and 3 deletions
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@ -256,16 +256,17 @@ static void io_wqe_wake_worker(struct io_wqe *wqe, struct io_wqe_acct *acct)
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raw_spin_lock_irq(&wqe->lock);
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if (acct->nr_workers < acct->max_workers) {
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atomic_inc(&acct->nr_running);
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atomic_inc(&wqe->wq->worker_refs);
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if (!acct->nr_workers)
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first = true;
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acct->nr_workers++;
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do_create = true;
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}
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raw_spin_unlock_irq(&wqe->lock);
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if (do_create)
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if (do_create) {
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atomic_inc(&acct->nr_running);
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atomic_inc(&wqe->wq->worker_refs);
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create_io_worker(wqe->wq, wqe, acct->index, first);
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}
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}
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}
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