This bug is somewhat difficult to reproduce. I still see it from time to time, but it seems to only happen under certain conditions, for example one process is maxing out a single CPU core, and a different one is trying to do a lot of I/O. It also seems to depend on the USB device, possibly only affecting certain transfer sizes. It's not as simple as just plugging in a thumb drive and dd'ing to it (although that is the primary use case when I see the bug.)
Additionally since I reported this bug I've upgraded my memory to 16GB. No, the issue was not caused by swapping, but the extra memory really cuts down on the i/o pressure because now pretty much everything is permanently cached. I've also more or less stopped using an external USB drive for my music etc, which is now on a NAS instead. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/770258 Title: Extremely high latency when writing to USB drives. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/770258/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
