Commit 2f611d04 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

scftorture: Allow zero weight to exclude an smp_call_function*() category 



This commit reworks the weighting calculations to allow zero to
be specified to disable a given weight.  For example, specifying the
scftorture.weight_resched=0 kernel boot parameter without specifying a
non-zero value for any of the other scftorture.weight_* parameters would
provide the default weights for the others, but would refrain from doing
any resched-based IPIs.

Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 6880fa6c

kernel/scftorture.c

+12 −12
Original line number Diff line number Diff line
@@ -553,18 +553,18 @@ static int __init scf_torture_init(void) 


	scftorture_print_module_parms("Start of test");



	if (weight_resched == -1 &&

	    weight_single == -1 && weight_single_rpc == -1 && weight_single_wait == -1 &&

	    weight_many == -1 && weight_many_wait == -1 &&

	    weight_all == -1 && weight_all_wait == -1) {

		weight_resched1 = 2 * nr_cpu_ids;

		weight_single1 = 2 * nr_cpu_ids;

		weight_single_rpc1 = 2 * nr_cpu_ids;

		weight_single_wait1 = 2 * nr_cpu_ids;

		weight_many1 = 2;

		weight_many_wait1 = 2;

		weight_all1 = 1;

		weight_all_wait1 = 1;

	if (weight_resched <= 0 &&

	    weight_single <= 0 && weight_single_rpc <= 0 && weight_single_wait <= 0 &&

	    weight_many <= 0 && weight_many_wait <= 0 &&

	    weight_all <= 0 && weight_all_wait <= 0) {

		weight_resched1 = weight_resched == 0 ? 0 : 2 * nr_cpu_ids;

		weight_single1 = weight_single == 0 ? 0 : 2 * nr_cpu_ids;

		weight_single_rpc1 = weight_single_rpc == 0 ? 0 : 2 * nr_cpu_ids;

		weight_single_wait1 = weight_single_wait == 0 ? 0 : 2 * nr_cpu_ids;

		weight_many1 = weight_many == 0 ? 0 : 2;

		weight_many_wait1 = weight_many_wait == 0 ? 0 : 2;

		weight_all1 = weight_all == 0 ? 0 : 1;

		weight_all_wait1 = weight_all_wait == 0 ? 0 : 1;

	} else {

		if (weight_resched == -1)

			weight_resched1 = 0;