Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-26 14:12:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

rcutorture: Abstract synchronous and polled API testing

Browse Source 
This commit abstracts a do_rtws_sync() function that does synchronous
grace-period testing, but also testing the polled API 25% of the time
each for the normal and full-state variants of the polled API.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2022-07-29 22:05:17 -07:00
parent 3fdefca9b4
commit ccb42229fb
1 changed files with 36 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
kernel/rcu/rcutorture.c
View File

@ -1207,6 +1207,40 @@ static void rcu_torture_write_types(void)
}
}
/*
* Do the specified rcu_torture_writer() synchronous grace period,
* while also testing out the polled APIs. Note well that the single-CPU
* grace-period optimizations must be accounted for.
*/
static void do_rtws_sync(struct torture_random_state *trsp, void (*sync)(void))
{
unsigned long cookie;
struct rcu_gp_oldstate cookie_full;
bool dopoll;
bool dopoll_full;
unsigned long r = torture_random(trsp);
dopoll = cur_ops->get_gp_state && cur_ops->poll_gp_state && !(r & 0x300);
dopoll_full = cur_ops->get_gp_state_full && cur_ops->poll_gp_state_full && !(r & 0xc00);
if (dopoll || dopoll_full)
cpus_read_lock();
if (dopoll)
cookie = cur_ops->get_gp_state();
if (dopoll_full)
cur_ops->get_gp_state_full(&cookie_full);
if (dopoll || (!IS_ENABLED(CONFIG_TINY_RCU) && dopoll_full && num_online_cpus() <= 1))
sync();
sync();
WARN_ONCE(dopoll && !cur_ops->poll_gp_state(cookie),
"%s: Cookie check 3 failed %pS() online %*pbl.",
__func__, sync, cpumask_pr_args(cpu_online_mask));
WARN_ONCE(dopoll_full && !cur_ops->poll_gp_state_full(&cookie_full),
"%s: Cookie check 4 failed %pS() online %*pbl",
__func__, sync, cpumask_pr_args(cpu_online_mask));
if (dopoll || dopoll_full)
cpus_read_unlock();
}
/*
* RCU torture writer kthread. Repeatedly substitutes a new structure
* for that pointed to by rcu_torture_current, freeing the old structure
@ -1295,12 +1329,7 @@ rcu_torture_writer(void *arg)
break;
case RTWS_EXP_SYNC:
rcu_torture_writer_state = RTWS_EXP_SYNC;
if (cur_ops->get_gp_state_full && cur_ops->poll_gp_state_full)
cur_ops->get_gp_state_full(&cookie_full);
cur_ops->exp_sync();
cur_ops->exp_sync();
if (cur_ops->get_gp_state_full && cur_ops->poll_gp_state_full)
WARN_ON_ONCE(!cur_ops->poll_gp_state_full(&cookie_full));
do_rtws_sync(&rand, cur_ops->exp_sync);
rcu_torture_pipe_update(old_rp);
break;
case RTWS_COND_GET:
@ -1339,12 +1368,7 @@ rcu_torture_writer(void *arg)
break;
case RTWS_SYNC:
rcu_torture_writer_state = RTWS_SYNC;
if (cur_ops->get_gp_state && cur_ops->poll_gp_state)
cookie = cur_ops->get_gp_state();
cur_ops->sync();
cur_ops->sync();
if (cur_ops->get_gp_state && cur_ops->poll_gp_state)
WARN_ON_ONCE(!cur_ops->poll_gp_state(cookie));
do_rtws_sync(&rand, cur_ops->sync);
rcu_torture_pipe_update(old_rp);
break;
default: