The lockups I have experienced with 2.6.12-rc-mm kernels have finally been fixed by this patch from Oleg Nesterov.
2.6.12-rc-mm Lockups Fixed
This article Jürgen Kreileder is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
Permissions beyond the scope of this license may be available at https://blog.blackdown.de/contact/.