linux-kernel - [PATCH] io-wq: set task TASK_INTERRUPTIBLE state before schedule

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Message-Id: <20201027030911.16596-1-qiang.zhang@windriver.com>
Date:   Tue, 27 Oct 2020 11:09:11 +0800
From:   qiang.zhang@...driver.com
To:     axboe@...nel.dk
Cc:     io-uring@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] io-wq: set task TASK_INTERRUPTIBLE state before schedule_timeout

From: Zqiang <qiang.zhang@...driver.com>

In 'io_wqe_worker' thread, if the work which in 'wqe->work_list' be
finished, the 'wqe->work_list' is empty, and after that the
'__io_worker_idle' func return false, the task state is TASK_RUNNING,
need to be set TASK_INTERRUPTIBLE before call schedule_timeout func.

Signed-off-by: Zqiang <qiang.zhang@...driver.com>
---
 fs/io-wq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io-wq.c b/fs/io-wq.c
index 02894df7656d..5f0626935b64 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -618,7 +618,7 @@ static int io_wqe_worker(void *data)
 		raw_spin_unlock_irq(&wqe->lock);
 		if (signal_pending(current))
 			flush_signals(current);
-		if (schedule_timeout(WORKER_IDLE_TIMEOUT))
+		if (schedule_timeout_interruptible(WORKER_IDLE_TIMEOUT))
 			continue;
 		/* timed out, exit unless we're the fixed worker */
 		if (test_bit(IO_WQ_BIT_EXIT, &wq->state) ||
-- 
2.17.1