Hi Ingo, Here's the second bunch of patches that prepare kernel to boot-time switching between paging modes.
It's a small one. I hope we can get it in quick. :) I include the zsmalloc patch again. We need something to address the issue. If we would find a better solution, we can come back to the topic and rework it. Apart from zsmalloc patch, the patchset includes changes to decompression code. I reworked these patches. They are split not exactly the way you've described before, but I hope it's sensible anyway. Please review and consider applying. Kirill A. Shutemov (4): mm/zsmalloc: Prepare to variable MAX_PHYSMEM_BITS x86/boot/compressed/64: Detect and handle 5-level paging at boot-time x86/boot/compressed/64: Introduce place_trampoline() x86/boot/compressed/64: Handle 5-level paging boot if kernel is above 4G arch/x86/boot/compressed/head_64.S | 99 ++++++++++++++++++++--------- arch/x86/boot/compressed/pagetable.c | 61 ++++++++++++++++++ arch/x86/boot/compressed/pagetable.h | 18 ++++++ arch/x86/include/asm/pgtable-3level_types.h | 1 + arch/x86/include/asm/pgtable_64_types.h | 2 + mm/zsmalloc.c | 13 ++-- 6 files changed, 158 insertions(+), 36 deletions(-) create mode 100644 arch/x86/boot/compressed/pagetable.h -- 2.14.2
