The problem and the fix are described in these notes to LKML: http://lkml.org/lkml/2005/12/8/304
There are some further changes upstream to deal with bugs in the first set of patches. Right now I'm running the Ubuntu 2.6.15-26 code with this set of patches, and things look good: 5a07a30c3cc4dc438494d6416ffa74008a2194b3 6eb0a0fd059598ee0d49c6283ce25cccd743e9fc d25bf7e5fe73b5b6d2246ab0be08ae35d718456b 76b461c21468f41837283b7888d55f1c0671f719 -- cpu idle time in /proc/stat wrong https://launchpad.net/bugs/30557 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
