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io_uring: add reschedule point to handle_tw_list()
Commit f586800854
upstream.
If CONFIG_PREEMPT_NONE is set and the task_work chains are long, we
could be running into issues blocking others for too long. Add a
reschedule check in handle_tw_list(), and flush the ctx if we need to
reschedule.
Cc: stable@vger.kernel.org # 5.10+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
9a2e8985c4
commit
549e380d21
1 changed files with 5 additions and 2 deletions
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@ -2217,9 +2217,12 @@ static void tctx_task_work(struct callback_head *cb)
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}
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req->io_task_work.func(req, &locked);
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node = next;
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if (unlikely(need_resched())) {
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ctx_flush_and_put(ctx, &locked);
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ctx = NULL;
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cond_resched();
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}
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} while (node);
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cond_resched();
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}
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ctx_flush_and_put(ctx, &locked);
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