Bryan J. Smith wrote: > > [ **BTW, I'm fully aware that the i686 kernel runs fairly optimized on > Athlon. But turning off the generic support, and optimizing for K7 > makes a significant difference for me in engineering applications. ] Are you sure that your custom-compiled kernels still have 4G/4G mode enabled? As choosing any other mode would give significant performance enhancements in certain applications. Regardless, it would probably be helpful if you could * check exactly what it was that helped (make sure that you only change the one parameter, and identify how much it's removing generic support, how much it's Athlon optimisation, and how much it's turning off 4G/4G). * benchmark it * if the performance improvements *are* significant, post it to the fedora-devel list and file a Request For Enhancement in bugzilla: the Fedora kernel crew can't help if they don't know there's a problem. James. -- E-mail address: james | In the Royal Air Force a landing's OK, @westexe.demon.co.uk | If the pilot gets out and can still walk away. | But in the Fleet Air Arm the outlook is grim, | If your landings are duff and you've not learnt to | swim.