RFC v5-> v6: https://lwn.net/Articles/1035116/ - Code improvement around the RCU usage (Usama) - Add selftests for khugepaged fork (Usama) - Add performance data for page fault (Usama) - Remove the RFC tag RFC v4->v5: https://lwn.net/Articles/1034265/ - Add support for vma (David) - Add mTHP support in khugepaged (Zi) - Use bitmask of all allowed orders instead (Zi) - Retrieve the page size and PMD order rather than hardcoding them (Zi) RFC v3->v4: https://lwn.net/Articles/1031829/ - Use a new interface get_suggested_order() (David) - Mark it as experimental (David, Lorenzo) - Code improvement in THP (Usama) - Code improvement in BPF struct ops (Amery) RFC v2->v3: https://lwn.net/Articles/1024545/ - Finer-graind tuning based on madvise or always mode (David, Lorenzo) - Use BPF to write more advanced policies logic (David, Lorenzo) RFC v1->v2: https://lwn.net/Articles/1021783/ The main changes are as follows, - Use struct_ops instead of fmod_ret (Alexei) - Introduce a new THP mode (Johannes) - Introduce new helpers for BPF hook (Zi) - Refine the commit log RFC v1: https://lwn.net/Articles/1019290/ Yafang Shao (10): mm: thp: remove disabled task from khugepaged_mm_slot mm: thp: add support for BPF based THP order selection mm: thp: decouple THP allocation between swap and page fault paths mm: thp: enable THP allocation exclusively through khugepaged bpf: mark mm->owner as __safe_rcu_or_null bpf: mark vma->vm_mm as __safe_trusted_or_null selftests/bpf: add a simple BPF based THP policy selftests/bpf: add test case to update THP policy selftests/bpf: add test cases for invalid thp_adjust usage Documentation: add BPF-based THP policy management Documentation/admin-guide/mm/transhuge.rst | 46 +++ MAINTAINERS | 3 + include/linux/huge_mm.h | 29 +- include/linux/khugepaged.h | 1 + kernel/bpf/verifier.c | 8 + kernel/sys.c | 6 + mm/Kconfig | 12 + mm/Makefile | 1 + mm/huge_memory.c | 3 +- mm/huge_memory_bpf.c | 243 +++++++++++++++ mm/khugepaged.c | 19 +- mm/memory.c | 15 +- tools/testing/selftests/bpf/config | 3 + .../selftests/bpf/prog_tests/thp_adjust.c | 284 ++++++++++++++++++ tools/testing/selftests/bpf/progs/lsm.c | 8 +- .../selftests/bpf/progs/test_thp_adjust.c | 114 +++++++ .../bpf/progs/test_thp_adjust_sleepable.c | 22 ++ .../bpf/progs/test_thp_adjust_trusted_owner.c | 30 ++ .../bpf/progs/test_thp_adjust_trusted_vma.c | 27 ++ 19 files changed, 849 insertions(+), 25 deletions(-) create mode 100644 mm/huge_memory_bpf.c create mode 100644 tools/testing/selftests/bpf/prog_tests/thp_adjust.c create mode 100644 tools/testing/selftests/bpf/progs/test_thp_adjust.c create mode 100644 tools/testing/selftests/bpf/progs/test_thp_adjust_sleepable.c create mode 100644 tools/testing/selftests/bpf/progs/test_thp_adjust_trusted_owner.c create mode 100644 tools/testing/selftests/bpf/progs/test_thp_adjust_trusted_vma.c -- 2.47.3
