This page is work in progress.

• Readahead works by tracing which files are used, but it works on whole files. Prefetch has greater resolution as it works on pages.
• Readahead cannot do prefetching and profiling at the same time, separate boot with profiling must be done.
• Readahead profiling is expensive (uses inotify).
• Readahead needs manual intervention from user to change readahead list, prefetch adapts itself automatically.