[PATCH v13 00/14] huge vmalloc mappings

Nicholas Piggin
2021-03-17T06:24:58Z

Important compound page fix thanks to Ding Tianhong.

Thanks,
Nick

Since v12:
- Use compound pages so it works with remap_vmalloc_range [noticed by Ding]
- Fix debug_vm_pgtable.c compile error.

Since v11:
- ARM compile fix (patch 1)
- debug_vm_pgtable compile fix

Since v10:
- Fixed code style, most > 80 colums, tweak patch titles, etc [thanks Christoph]
- Made huge vmalloc code and data structure compile away if unselected
[Christoph]
- Archs only have to provide arch_vmap_p?d_supported for levels they
implement [Christoph]

Since v9:
- Fixed intermediate build breakage on x86-32 !PAE [thanks Ding]
- Fixed small page fallback case vm_struct double-free [thanks Ding]

Since v8:
- Fixed nommu compile.
- Added Kconfig option help text
- Added VM_NOHUGE which should help archs implement it [suggested by Rick]

Since v7:
- Rebase, added some acks, compile fix
- Removed "order=" from vmallocinfo, it's a bit confusing (nr_pages
is in small page size for compatibility).
- Added arch_vmap_pmd_supported() test before starting to allocate
the large page, rather than only testing it when doing the map, to
avoid unsupported configs trying to allocate huge pages for no
reason.

Since v6:
- Fixed a false positive warning introduced in patch 2, found by
kbuild test robot.

Since v5:
- Split arch changes out better and make the constant folding work
- Avoid most of the 80 column wrap, fix a reference to lib/ioremap.c
- Fix compile error on some archs

*** BLURB HERE ***

Nicholas Piggin (14):
ARM: mm: add missing pud_page define to 2-level page tables
mm/vmalloc: fix HUGE_VMAP regression by enabling huge pages in
vmalloc_to_page
mm: apply_to_pte_range warn and fail if a large pte is encountered
mm/vmalloc: rename vmap_*_range vmap_pages_*_range
mm/ioremap: rename ioremap_*_range to vmap_*_range
mm: HUGE_VMAP arch support cleanup
powerpc: inline huge vmap supported functions
arm64: inline huge vmap supported functions
x86: inline huge vmap supported functions
mm/vmalloc: provide fallback arch huge vmap support functions
mm: Move vmap_range from mm/ioremap.c to mm/vmalloc.c
mm/vmalloc: add vmap_range_noflush variant
mm/vmalloc: Hugepage vmalloc mappings
powerpc/64s/radix: Enable huge vmalloc mappings

.../admin-guide/kernel-parameters.txt | 2 +
arch/Kconfig | 11 +
arch/arm/include/asm/pgtable-3level.h | 2 -
arch/arm/include/asm/pgtable.h | 3 +
arch/arm64/include/asm/vmalloc.h | 24 +
arch/arm64/mm/mmu.c | 26 -
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/vmalloc.h | 20 +
arch/powerpc/kernel/module.c | 22 +-
arch/powerpc/mm/book3s64/radix_pgtable.c | 21 -
arch/x86/include/asm/vmalloc.h | 20 +
arch/x86/mm/ioremap.c | 19 -
arch/x86/mm/pgtable.c | 13 -
include/linux/io.h | 9 -
include/linux/vmalloc.h | 46 ++
init/main.c | 1 -
mm/debug_vm_pgtable.c | 4 +-
mm/ioremap.c | 225 +-------
mm/memory.c | 66 ++-
mm/page_alloc.c | 5 +-
mm/vmalloc.c | 485 +++++++++++++++---
21 files changed, 621 insertions(+), 404 deletions(-)

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2.23.0