Anybody here know how I find who on Earth cares: > make xconfig ... > "Processor type and features" > "Symmetric multi-processing support" = No ... Toggling CONFIG_SMP back and forth via xconfig may produce a third kind of .config, because 2.6.0-test8 `make xconfig` neglects to restore the defconfig choice: CONFIG_X86_MCE_P4THERMAL=y. This behaviour is at least as old as 2.6.0-test6. To see it, you have to exit and relaunch make xconfig, you can't just toggle within make xconfig. linux-fsdevel noticed this in passing. Pat LaVarre -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/