Re: [PATCH 6/6] IA64-sn2_smp: Combine two seq_printf() calls into one call in sn2_ptc_seq_show()

[Julia Lawall]

On Sat, 22 Oct 2016, SF Markus Elfring wrote:

> >> @@ -494,12 +494,11 @@ static int sn2_ptc_seq_show(struct seq_file *file, void *data)
> >>  	int cpu;
> >>
> >>  	cpu = *(loff_t *) data;
> >> -
> >> -	if (!cpu) {
> >> +	if (!cpu)
> >>  		seq_printf(file,
> >> -			   "# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2 ipi_fluches ipi_nsec\n");
> >> -		seq_printf(file, "# ptctest %d, flushopt %d\n", sn2_ptctest, sn2_flush_opt);
> >> -	}
> >> +			   "# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2 ipi_fluches ipi_nsec\n"
> >> +			   "# ptctest %d, flushopt %d\n",
> >> +			   sn2_ptctest, sn2_flush_opt);
> >>
> >>  	if (cpu < nr_cpu_ids && cpu_online(cpu)) {
> >>  		stat = &per_cpu(ptcstats, cpu);
> >
> > Please think more.
> >
> > printf has to inspect character by character looking for
> > a vsprintf % character and 0 termination.
> >
> > seq_puts does a strlen then memcpy.
>
> Would you prefer to use this function also at this source code place?

I think that he is expecting that you will figure out the answer by
yourself.

julia