On Tue, Jul 11, 2023 at 08:22:08PM +0800, Zehao Zhang wrote: > Add ftrace support for exFAT file system, > and add some tracepoints: Why? I don't believe these are useful. Because if you actually had use for them, you would have noticed that you're missing 99% of the reads issued to the filesystem from the VFS -- through exfat_readahead(), which you didn't instrument. So what do you actually want to know, and why can't you get that information already?