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Xuan Zhuo authored
When the user consumes and generates sqe at a fast rate, io_sqring_entries can always get sqe, and ret will not be equal to -EBUSY, so that io_sq_thread will never call cond_resched or schedule, and then we will get the following system error prompt: rcu: INFO: rcu_sched self-detected stall on CPU or watchdog: BUG: soft lockup-CPU#23 stuck for 112s! [io_uring-sq:1863] This patch checks whether need to call cond_resched() by checking the need_resched() function every cycle. Suggested-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
Xuan Zhuo <xuanzhuo@linux.alibaba.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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