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bytecodealliance / wasmtime Public

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memfd/madvise-based CoW pooling allocator#3697

Merged

cfallin merged 12 commits intobytecodealliance:mainbytecodealliance/wasmtime:mainfrom cfallin:memfd-cowcfallin/wasmtime:memfd-cowCopy head branch name to clipboard

Feb 2, 2022

+1,331-148

Conversation Commits12 (12)Checks Files changed

Commits

Commits on Jan 31, 2022

Add a pooling allocator mode based on copy-on-write mappings of memfds.
cfallin
committed
Remove ftruncate-trick for heap growth with memfd backend.
cfallin
committed
Use MemFdSlot in the on-demand allocator as well.
cfallin
committed

Commits on Feb 1, 2022

Review feedback.
cfallin
committed
Optimization: only mprotect the *new* bit of heap, not all of it.
cfallin
committed
Make build-config magic use memfd by default.
cfallin
committed
Review feedback.
cfallin
committed

Commits on Feb 2, 2022

Fix to the optimization: mprotect(NONE) sometimes needed after skipping the initial mmap.
cfallin
committed
Review comments.
cfallin
committed
Add additional tests for MemFdSlot.
cfallin
committed
Review comments.
cfallin
committed
Skip memfd tests when on qemu, due to differing madvise semantics.
cfallin
committed

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