We're still working on a way to repro this on a new instance. Meanwhile, we're moving forward with testing on the newer 2.6.32 kernel and on Maverick's 2.6.35 kernel.
One observation we have made is that if we run the libctest in a loop (`while :; do ./libctest; done`) on 2.6.32 it will eventually hang the process (apparently forever, I've left it as long as 4 hours). This behavior is reproducible on a fresh instance and happens on both 2.6.32-305 and 2.6.32-311. We are NOT able to repro on 2.6.35. Could be unrelated, or expected behavior, but from my review of the libctest code what we're seeing does appear pathological. -- You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. https://bugs.launchpad.net/bugs/708920 Title: Strange 'fork/clone' blocking behavior under high cpu usage on EC2 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
