> > How to make better use of the remaining ITLB slots is tricky. > > Somehow one would want to map at lest one to modules but I cannot see how. > > No. If you use modules, you pay the price. Sane embedded solutions > running in "tight" environments don't use modules :-) No point pinning > TLB entries on the vmalloc space, really.
Long ago (2.4 days I think) when using modules on ppc 4xx we hacked the module_alloc function (or whatever it was called back then) to allocate space in the kernel pinned TLB instead of using vmalloc. Gave something like a 2x speedup for module code, since the 4xx TLB is so small and the miss handling is so expensive. I assume it should still be possible to do a similar hack with current kernels. - R. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
