This series enables vmemmap backing memory allocation from device memory ranges on arm64. But before that, it enables vmemmap_populate_basepages() and vmemmap_alloc_block_buf() to accommodate struct vmem_altmap based alocation requests.
This series applies on 5.8-rc4. Changes in V4: - Dropped 'fallback' from vmemmap_alloc_block_buf() per Catalin Changes in V3: (https://patchwork.kernel.org/project/linux-mm/list/?series=304707) - Dropped comment from free_hotplug_page_range() per Robin - Modified comment in unmap_hotplug_range() per Robin - Enabled altmap support in vmemmap_alloc_block_buf() per Robin Changes in V2: (https://lkml.org/lkml/2020/3/4/475) - Rebased on latest hot-remove series (v14) adding P4D page table support Changes in V1: (https://lkml.org/lkml/2020/1/23/12) - Added an WARN_ON() in unmap_hotplug_range() when altmap is provided without the page table backing memory being freed Changes in RFC V2: (https://lkml.org/lkml/2019/10/21/11) - Changed the commit message on 1/2 patch per Will - Changed the commit message on 2/2 patch as well - Rebased on arm64 memory hot remove series (v10) RFC V1: (https://lkml.org/lkml/2019/6/28/32) Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Tony Luck <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Michal Hocko <[email protected]> Cc: "Matthew Wilcox (Oracle)" <[email protected]> Cc: "Kirill A. Shutemov" <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Dan Williams <[email protected]> Cc: Pavel Tatashin <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Anshuman Khandual (3): mm/sparsemem: Enable vmem_altmap support in vmemmap_populate_basepages() mm/sparsemem: Enable vmem_altmap support in vmemmap_alloc_block_buf() arm64/mm: Enable vmem_altmap support for vmemmap mappings Documentation/vm/memory-model.rst | 2 +- arch/arm64/mm/mmu.c | 58 ++++++++++++++++++++----------- arch/ia64/mm/discontig.c | 2 +- arch/powerpc/mm/init_64.c | 4 +-- arch/riscv/mm/init.c | 2 +- arch/x86/mm/init_64.c | 11 +++--- include/linux/mm.h | 9 ++--- mm/sparse-vmemmap.c | 36 ++++++++++--------- 8 files changed, 72 insertions(+), 52 deletions(-) -- 2.20.1
