[PATCH 0/7] thp/khugepaged improvements and CoW semantics

Kirill A. Shutemov
2020-03-27T17:06:28Z

The patchset adds khugepaged selftest (anon-THP only for now), expands
cases khugepaged can handle and switches anon-THP copy-on-write handling
to 4k.

Please review and consider applying.

Kirill A. Shutemov (7):
khugepaged: Add self test
khugepaged: Do not stop collapse if less than half PTEs are referenced
khugepaged: Drain LRU add pagevec to get rid of extra pins
khugepaged: Allow to callapse a page shared across fork
khugepaged: Allow to collapse PTE-mapped compound pages
thp: Change CoW semantics for anon-THP
khugepaged: Introduce 'max_ptes_shared' tunable

Documentation/admin-guide/mm/transhuge.rst | 7 +
mm/huge_memory.c | 247 +-----
mm/khugepaged.c | 124 ++-
tools/testing/selftests/vm/Makefile | 1 +
tools/testing/selftests/vm/khugepaged.c | 924 +++++++++++++++++++++
5 files changed, 1057 insertions(+), 246 deletions(-)
create mode 100644 tools/testing/selftests/vm/khugepaged.c

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2.26.0