Hello, Sage. I meet the same bug as #5883. It is happy to know that the bug is fixed, but although I spent lots of time to try to get why, I still couldn't understand the reason. Is there any race conditions? Or which threads? I guess the threads about this bug are Pipe.reader and DispatchQueue.entry, But I am not sure. Maybe you can give me more details. Thank you very much. -- Dong Yuan Email:yuandong1222@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html