[$] A discussion on readahead

Readahead is an I/Ooptimization that causes the system to read more data than has been requested by an application-in the belief that the extra data willbe requested soon thereafter. At the2022 Linux Storage,Filesystem, Memory-management and BPF Summit (LSFMM), Matthew Wilcoxled a session to discuss readahead, especially as it relates to networkfilesystems, with assistance from Steve French andDavid Howells. The latency of the underlying storage needs to factor intothe calculation of how much data to read in advance, but it is not entirelyclear how to do so.