Worked on stabilizing the storage prefetch path in the jd-opensource/xllm repository, focusing on improving reliability during high I/O operations. Addressed a critical bug in the prefetch_from_storage function by correcting early return logic, ensuring proper block allocation and control flow. This targeted fix reduced the risk of stalls and misallocation in storage prefetch scenarios, directly enhancing runtime stability under load. The work involved careful C++ bug fixing and performance optimization, with an emphasis on code quality and maintainability. The changes were integrated as a review-friendly patch, improving traceability and robustness in the storage pipeline without introducing new features.