FWIW, I have taken to CONFIG_PREEMPT=y in my hacking kernels because it exposed on my clunky test machines bugs that were otherwise reproduced only on big honking machines with lots of parallelism. I haven't experienced a bug that wasn't there at all with CONFIG_PREEMPT=n, only ones that were hard to reproduce in hacker's conditions but more likely in production load conditions. So, out of sight, out of mind, sure. But out of sight, lurking to bite you in the ass later when you really aren't in the mood, also damn likely. Roland
