This issue has been isolated down to the "udev" package. Using "udev 175-0ubuntu6" the disk I/O is fine Using "udev 175-0ubuntu9" the intensive disk bashing test fails.
The test has been repeated now a few times of starting from a fesh installation of the 2012.03.27 ISO, verifying things work properly, then making only the one package upgrade change, and then verifying that the disk test fails. doug@test-smy:~/temp-kernel$ diff b3_pkg.txt b3_udev.txt 390c390 < ii udev 175-0ubuntu6 rule-based device node and kernel event manager --- > ii udev 175-0ubuntu9 rule-based > device node and kernel event manager The next step will be to attempt to isolate the exact change within that package. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/986654 Title: disk I/O race condition after update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/986654/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
