Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote on 2010/03/16 22:19:36: > > On Fri, 2010-02-26 at 09:29 +0100, Joakim Tjernlund wrote: > > +#ifdef CONFIG_MODULES > > + /* Only modules will cause ITLB Misses as we always > > + * pin the first 8MB of kernel memory */ > > andi. r11, r10, 0x0800 /* Address >= 0x80000000 */ > > beq 3f > > lis r11, swapper_pg_...@h > > ori r11, r11, swapper_pg_...@l > > rlwimi r10, r11, 0, 2, 19 > > 3: > > +#endif > > You can optimize that further I think... > > You can probably just remove the code above, and add something to > do_page_fault() that lazily copies the kernel PGD entries from > swapper_pg_dir to the app pgdir. (You can even pre-fill that when > creating a new mm).
I did look at this at some point and could not figure out how to do this. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
