//go:build linux || freebsd package fs import ( "fmt" "os" "golang.org/x/sys/unix" ) func fadviseSequentialRead(f *os.File, prefetch bool) error { fd := int(f.Fd()) mode := unix.FADV_SEQUENTIAL if prefetch { mode |= unix.FADV_WILLNEED } if err := unix.Fadvise(int(fd), 0, 0, mode); err != nil { return fmt.Errorf("error returned from unix.Fadvise(%d): %w", mode, err) } return nil }