On Sun, Jul 05, 2020 at 01:24:07PM +0200, Geert Uytterhoeven wrote: > Hi Greg, > > On Sun, Jul 5, 2020 at 8:55 AM Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Sat, Jul 04, 2020 at 08:38:26PM +0200, Geert Uytterhoeven wrote: > > > On Sat, Jul 4, 2020 at 4:05 PM Greg Kroah-Hartman > > > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > Test the functionality of readfile(2) in various ways. > > > > > > > > Also provide a simple speed test program to benchmark using readfile() > > > > instead of using open()/read()/close(). > > > > > > > > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > > > > --- /dev/null > > > > +++ b/tools/testing/selftests/readfile/readfile.c > > > > > > > +static void readfile(const char *filename) > > > > +{ > > > > +// int root_fd; > > > > > > ??? > > > > Ugh, sorry about that, I obviously didn't clean up my last tests from > > this file, thanks for catching that. > > Reading about seq_file behavior, did the commented-out test for > "/sys/kernel/debug/usb/devices" work? Yes it did, which means I need to go dig to try to find a "problem" seq_file procfs file to try to debug that behavior... thanks, greg k-h