On Wed, Aug 12, 2015 at 04:34:17PM -0700, Roy Yang wrote: > Hi Ted, > > Appreciate your time, and will get the log from normal work load. > > BTW, the previous JBD2 log is from the node which is in bad state. > Normal node finish within 3 seconds; while on this node, it takes 10 seconds. Ah, you didn't say that. If this is a node in a bad state, and we're not seeing any real delays from the jbd2 logs, then it sounds very much like the problem is a hardware issue (or maybe an NVMe device driver issue). You might want to use blktrace to see how long the underlying I/O operations are taking to complete. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
