On Tue, 2007-11-20 at 07:26 +0100, Nick Piggin wrote: > > BTW, here is another thing which you might want to think about. Again > untested for temporary lack of hardware. > > -- > > The radix-tree is now RCU safe, so powerpc can avoid the games it was playing > in order to have a lockless readside. Saves an irq disable/enable, a couple of > __get_cpu_var()s, a cacheline, and a memory barrier, in the fastpath. Should > save a cycle or two...
Yup, I know. I need to work on that for -rt anyway due to other issues... Thanks ! Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev