On Wed, Apr 11, 2007 at 10:30:58PM -0700, Zachary Amsden wrote: > In situations where page table updates need only be made locally, and there > is no cross-processor A/D bit races involved, we need not use the heavyweight > xchg instruction to atomically fetch and clear page table entries. Instead, > we can just read and clear them directly. > > This introduces a neat optimization for non-SMP kernels; drop the atomic > xchg operations from page table updates. Would it be feasible to do this using the smp_alternatives stuff? Given many distros are now shipping SMP-only kernels, it'd be nice to get that win without using having to rebuild their kernels. Dave -- http://www.codemonkey.org.uk _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
