fix(overlayfs): rename negcache_eviction → negcache_admission (matching admission-cap policy)#256
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…h admission-cap policy The negative cache implements an admission cap (reject new entries when full), not LRU eviction of oldest entries. Changes: - Rename test file from negcache_eviction_test.go to negcache_admission_test.go - Update docs/engineering/design/test-gap-analysis.md item #13 to accurately describe "admission-cap" instead of "eviction" This aligns documentation and test naming with the actual behavior: bounded growth via load-or-store gate, no eviction of oldest entries.
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Addresses #245
Aligns test naming and docs with actual negative-cache behavior:
The implementation is an admission-cap, not eviction:
negCacheCount >= maxNegCacheEntries, new misses skip caching (LoadOrStore gates)Changes:
negcache_eviction_test.gorenamed →negcache_admission_test.godocs/engineering/design/test-gap-analysis.md:72updated:CI: All tests pass ✅