On Tue, Mar 22, 2022 at 08:27:12PM +0100, Miklos Szeredi wrote: > Add a new userspace API that allows getting multiple short values in a > single syscall. > > This would be useful for the following reasons: > > - Calling open/read/close for many small files is inefficient. E.g. on my > desktop invoking lsof(1) results in ~60k open + read + close calls under > /proc and 90% of those are 128 bytes or less. As I found out in testing readfile(): https://lore.kernel.org/r/20200704140250.423345-1-gregkh@xxxxxxxxxxxxxxxxxxx microbenchmarks do show a tiny improvement in doing something like this, but that's not a real-world application. Do you have anything real that can use this that shows a speedup? thanks, greg k-h
