We can get a significant win with larger mappings for some of the big global hashes.
Since RFC, relevant architectures have added p?d_leaf accessors so no real arch changes required, and I changed it not to allocate huge mappings for modules and a bunch of other fixes. Nicholas Piggin (4): mm/vmalloc: fix vmalloc_to_page for huge vmap mappings mm: Move ioremap page table mapping function to mm/ mm: HUGE_VMAP arch query functions cleanup mm/vmalloc: Hugepage vmalloc mappings arch/arm64/mm/mmu.c | 8 +- arch/powerpc/mm/book3s64/radix_pgtable.c | 6 +- arch/x86/mm/ioremap.c | 6 +- include/linux/io.h | 3 - include/linux/vmalloc.h | 15 + lib/ioremap.c | 203 +---------- mm/vmalloc.c | 413 +++++++++++++++++++---- 7 files changed, 380 insertions(+), 274 deletions(-) -- 2.23.0
