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Introduce pinned extents to contain unpurgeable pages

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Some pages (e.g., hugetlb pages) cannot be purged, and need to be prioritized for reusing. For now, this comes from arenas with custom extent hooks. The lowest bit of the alloc hook is borrowed as a flag bit to indicate that the extent is considered pinned.
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Bin Liu 2026-04-13 16:48:35 -07:00
parent 6515df8cec
commit 5459e20f59
18 changed files with 485 additions and 50 deletions
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Makefile.in
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@ -242,6 +242,7 @@ TESTS_UNIT := \
$(srcroot)test/unit/hpa_vectorized_madvise_large_batch.c \
$(srcroot)test/unit/hpa_background_thread.c \
$(srcroot)test/unit/hpdata.c \
$(srcroot)test/unit/extent_alloc_flags.c \
$(srcroot)test/unit/huge.c \
$(srcroot)test/unit/inspect.c \
$(srcroot)test/unit/junk.c \