While there is not yet a patch that I would suspect of being the one fixing this issue, there were a larger number of changes that had been done upstream but missed the Lucid ec2 kernel because it is using xen specific copies of x86 files. Some of them will have no effect as compile options cause the code not to be included but some were in areas which may have effect on this issue.
I have prepared some test kernel packages (and also some test aki's) which contain the sync with all current stable updates. It would be awesome if someone could check that kernel and see whether it removes the problem already (at least not introduces new ones). I booted a i386 and amd64 instance with it and could not see immediate problems. The debian packages (for pv-grub) would be at http://people.canonical.com/~smb/lp708920/, the aki's are: us-west-1 aki-4faefe0a x86_64 us-east-1 aki-9ab546f3 x86_64 eu-west-1 aki-bdf2c6c9 x86_64 ap-southeast-1 aki-8689f7d4 x86_64 us-west-1 aki-49aefe0c i386 us-east-1 aki-6cb44705 i386 eu-west-1 aki-a7f2c6d3 i386 ap-southeast-1 aki-8c89f7de i386 -- 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
