Messages in this thread | | | Subject | Re: [PATCH v1 0/5] mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault/prealloc memory | From | David Hildenbrand <> | Date | Tue, 30 Mar 2021 10:58:43 +0200 |
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On 17.03.21 12:06, David Hildenbrand wrote: > Excessive details on MADV_POPULATE_(READ|WRITE) can be found in patch #2. > > Now accompanied by minor adjustments and selftests/vm tests. > > RFCv2 -> v1 > - "mm: fix variable name in declaration of populate_vma_page_range()" > -- Added > - "mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault ..." > -- Fix detection of memory holes when we have to re-lookup the VMA > -- Return -EHWPOISON to user space when we hit HW poisoned pages > -- Make variable names in definition and declaration consistent > - "MAINTAINERS: add tools/testing/selftests/vm/ to MEMORY MANAGEMENT" > -- Added > - "selftests/vm: add protection_keys_32 / protection_keys_64 to gitignore" > -- Added > - "selftests/vm: add test for MADV_POPULATE_(READ|WRITE)" > -- Added > > RFC -> RFCv2: > - Fix re-locking (-> set "locked = 1;") > - Don't mimic MAP_POPULATE semantics: > --> Explicit READ/WRITE request instead of selecting it automatically, > which makes it more generic and better suited for some use cases (e.g., we > usually want to prefault shmem writable) > --> Require proper access permissions > - Introduce and use faultin_vma_page_range() > --> Properly handle HWPOISON pages (FOLL_HWPOISON) > --> Require proper access permissions (!FOLL_FORCE) > - Let faultin_vma_page_range() check for compatible mappings/permissions > - Extend patch description and add some performance numbers > > David Hildenbrand (5): > mm: make variable names for populate_vma_page_range() consistent > mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault/prealloc > memory > MAINTAINERS: add tools/testing/selftests/vm/ to MEMORY MANAGEMENT > selftests/vm: add protection_keys_32 / protection_keys_64 to gitignore > selftests/vm: add test for MADV_POPULATE_(READ|WRITE) > > MAINTAINERS | 1 + > arch/alpha/include/uapi/asm/mman.h | 3 + > arch/mips/include/uapi/asm/mman.h | 3 + > arch/parisc/include/uapi/asm/mman.h | 3 + > arch/xtensa/include/uapi/asm/mman.h | 3 + > include/uapi/asm-generic/mman-common.h | 3 + > mm/gup.c | 54 ++++ > mm/internal.h | 5 +- > mm/madvise.c | 69 +++++ > tools/testing/selftests/vm/.gitignore | 3 + > tools/testing/selftests/vm/Makefile | 1 + > tools/testing/selftests/vm/madv_populate.c | 342 +++++++++++++++++++++ > tools/testing/selftests/vm/run_vmtests.sh | 16 + > 13 files changed, 505 insertions(+), 1 deletion(-) > create mode 100644 tools/testing/selftests/vm/madv_populate.c >
Gentle ping.
-- Thanks,
David / dhildenb
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