User description

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue #21838

What this PR does / why we need it:

• The fix includes adding deleted status to avoid double postEvict/remove from hashtable.
• Gemini AI also review and didn't detect any race condition
• run test and benchmark with -race flag.
• set the dellocated buffer to nil and panic when try to access deallocated buffer
• defer Bytes.Release() at the end of postEvict() function
• remove retain/release from post functions. Do retain/release inside the cache.

PR Type

Bug fix, Enhancement

Description

• Fix S3-FIFO cache race conditions and memory management

• Add proper reference counting for cache data

• Implement thread-safe operations with mutex protection

• Add ghost queue for S3-FIFO algorithm optimization

Changes diagram

flowchart LR
 A["Cache Operations"] --> B["Thread Safety"]
 B --> C["Reference Counting"]
 C --> D["Memory Management"]
 A --> E["S3-FIFO Algorithm"]
 E --> F["Ghost Queue"]
 F --> G["Eviction Policy"]

Changes walkthrough 📝

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