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rcu: Stop testing RCU-bh and RCU-sched

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Now that the RCU-bh and RCU-sched update-side functions are simple
wrappers around their RCU counterparts, there isn't a whole lot of
point in testing them.  This commit therefore removes the self-test
capability and removes the corresponding kernel-boot parameters.
It also updates the various rcutorture .boot files to remove the
kernel boot parameters that call for testing RCU-bh and RCU-sched.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-07-07 10:24:23 -07:00
parent 2ceebc0350
commit 72ce30dd1f
8 changed files with 3 additions and 53 deletions
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6
Documentation/admin-guide/kernel-parameters.txt
View File

@ -3863,12 +3863,6 @@
rcupdate.rcu_self_test= [KNL]
Run the RCU early boot self tests
rcupdate.rcu_self_test_bh= [KNL]
Run the RCU bh early boot self tests
rcupdate.rcu_self_test_sched= [KNL]
Run the RCU sched early boot self tests
rdinit= [KNL]
Format: <full_path>
Run specified binary instead of /init from the ramdisk,

38
kernel/rcu/update.c
View File

@ -203,11 +203,7 @@ void rcu_test_sync_prims(void)
if (!IS_ENABLED(CONFIG_PROVE_RCU))
return;
synchronize_rcu();
synchronize_rcu_bh();
synchronize_sched();
synchronize_rcu_expedited();
synchronize_rcu_bh_expedited();
synchronize_sched_expedited();
}
#if !defined(CONFIG_TINY_RCU) || defined(CONFIG_SRCU)
@ -870,15 +866,10 @@ static void __init rcu_tasks_bootup_oddness(void)
#ifdef CONFIG_PROVE_RCU
/*
* Early boot self test parameters, one for each flavor
* Early boot self test parameters.
*/
static bool rcu_self_test;
static bool rcu_self_test_bh;
static bool rcu_self_test_sched;
module_param(rcu_self_test, bool, 0444);
module_param(rcu_self_test_bh, bool, 0444);
module_param(rcu_self_test_sched, bool, 0444);
static int rcu_self_test_counter;
@ -895,30 +886,12 @@ static void early_boot_test_call_rcu(void)
call_rcu(&head, test_callback);
}
static void early_boot_test_call_rcu_bh(void)
{
static struct rcu_head head;
call_rcu_bh(&head, test_callback);
}
static void early_boot_test_call_rcu_sched(void)
{
static struct rcu_head head;
call_rcu_sched(&head, test_callback);
}
void rcu_early_boot_tests(void)
{
pr_info("Running RCU self tests\n");
if (rcu_self_test)
early_boot_test_call_rcu();
if (rcu_self_test_bh)
early_boot_test_call_rcu_bh();
if (rcu_self_test_sched)
early_boot_test_call_rcu_sched();
rcu_test_sync_prims();
}
@ -931,15 +904,6 @@ static int rcu_verify_early_boot_tests(void)
early_boot_test_counter++;
rcu_barrier();
}
if (rcu_self_test_bh) {
early_boot_test_counter++;
rcu_barrier_bh();
}
if (rcu_self_test_sched) {
early_boot_test_counter++;
rcu_barrier_sched();
}
if (rcu_self_test_counter != early_boot_test_counter) {
WARN_ON(1);
ret = -1;

2
tools/testing/selftests/rcutorture/configs/rcu/TINY02.boot
View File

@ -1,3 +1 @@
rcupdate.rcu_self_test=1
rcupdate.rcu_self_test_bh=1
rcutorture.torture_type=rcu_bh

2
tools/testing/selftests/rcutorture/configs/rcu/TREE01.boot
View File

@ -1,4 +1,4 @@
rcutorture.torture_type=rcu_bh maxcpus=8 nr_cpus=43
maxcpus=8 nr_cpus=43
rcutree.gp_preinit_delay=3
rcutree.gp_init_delay=3
rcutree.gp_cleanup_delay=3

2
tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot
View File

@ -1 +1 @@
rcutorture.torture_type=rcu_bh rcutree.rcu_fanout_leaf=4 nohz_full=1-7
rcutree.rcu_fanout_leaf=4 nohz_full=1-7

2
tools/testing/selftests/rcutorture/configs/rcu/TREE05.boot
View File

@ -1,5 +1,3 @@
rcutorture.torture_type=sched
rcupdate.rcu_self_test_sched=1
rcutree.gp_preinit_delay=3
rcutree.gp_init_delay=3
rcutree.gp_cleanup_delay=3

2
tools/testing/selftests/rcutorture/configs/rcu/TREE06.boot
View File

@ -1,6 +1,4 @@
rcupdate.rcu_self_test=1
rcupdate.rcu_self_test_bh=1
rcupdate.rcu_self_test_sched=1
rcutree.rcu_fanout_exact=1
rcutree.gp_preinit_delay=3
rcutree.gp_init_delay=3

2
tools/testing/selftests/rcutorture/configs/rcu/TREE08.boot
View File

@ -1,5 +1,3 @@
rcutorture.torture_type=sched
rcupdate.rcu_self_test=1
rcupdate.rcu_self_test_sched=1
rcutree.rcu_fanout_exact=1
rcu_nocbs=0-7