From: Hillf Danton <hdanton@sina.com>
Date: Tue, 24 Dec 2019 16:14:29 +0000 (-0700)
Subject: io-wq: add cond_resched() to worker thread
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fd1c4bc6e9b34a5e4fe7a3130a49380ef9d7037c;p=linux.git

io-wq: add cond_resched() to worker thread

Reschedule the current IO worker to cut the risk that it is becoming
a cpu hog.

Signed-off-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io-wq.c b/fs/io-wq.c
index a1c85458f021a..541c8a3e0bbb5 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -429,6 +429,8 @@ next:
 		if (signal_pending(current))
 			flush_signals(current);
 
+		cond_resched();
+
 		spin_lock_irq(&worker->lock);
 		worker->cur_work = work;
 		spin_unlock_irq(&worker->lock);