Readahead Handling Issue in Linux Kernel Affecting NFS Performance

CVE-2024-57839

Summary

A recently identified problem in the Linux Kernel affects NFS performance tied to readahead operations. The issue arises when the system occasionally hangs due to a bug linked to readahead logic, particularly after the reversion of a specific commit. The reverting action aims to resolve unexpected behavior where readahead sizes become negative, causing instability and interruptions in system performance. While reverting introduces lower readahead throughput, it mitigates more severe system hangs, ensuring better stability until a more permanent solution can be engineered.

References