On Wed, 2016-06-08 at 09:03 +0200, Christophe Leroy wrote: > In see in the current ppc kernel that for PPC32, SYS_SUPPORTS_HUGETLBFS > is selected only if we have PHYS_64BIT. > What is the reason for only implementing HUGETLBFS with 64 bits phys > addresses ?
That's not for PPC32 in general -- it's for 32-bit FSL Book E. The reason for the limitation is that there are separate TLB miss handlers depending on whether PHYS_64BIT is enabled, and we didn't want to have to implement hugetlb support in both of them unless there was actual demand for it. > From your point of view, what would be the best approach to extend > support of HUGE PAGES to PPC_8xx ? > Would the good starting point be to implement a hugepagetlb-8xx.c from > hugepagetlb-book3e.c ? Yes. -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
