On Mon, May 21, 2012 at 08:42:12AM -0400, Prarit Bhargava wrote: > Josh, the reality is that 64 isn't "enough" anymore. Even deskside systems are > starting to ship with 32 cores, so increasing the number of CPUs to 128 is a > good idea. I've had a lot of experience with larger systems. The increase in > memory footprint is minimal (a few Kb, not Mb). I'll get this into rawhide shortly unless someone else brings up counter-points (doubtful). > Jumping to 128 is a very good idea. We know it is stable given RHEL's support > of 4096 (again, I don't think Fedora should entertain jumping to 4096 for a > variety of reasons). I'm not concerned with the stability aspect of it. Before the recent-ish change, we had it set to 256 on released kernels and 512 for rawhide/debug kernels. We know it works. For rawhide/debug kernels we already set it to MAXSMP. For the record, I'm not going to change 32-bit kernels. I don't see much of a need to increase that beyond what it is today and the same arguments about more cores being added don't really apply to 32-bit chips. (Before someone points out that you can run 32-bit kernels on 64-bit hardware, I just wanted to say I don't care. If you have a CPU that has 128 cores and want to use them all, use a 64-bit kernel ;) .) josh _______________________________________________ kernel mailing list kernel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/kernel
