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rcutorture: Print message before invoking ->cb_barrier()

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The various ->cb_barrier() functions, for example, rcu_barrier(),
sometimes cause rcutorture hangs.  But currently, the last console
message is the unenlightening "Stopping rcu_torture_stats".  This commit
therefore prints a message of the form "rcu_torture_cleanup: Invoking
rcu_barrier+0x0/0x1e0()" to help point people in the right direction.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2021-12-06 15:12:14 -08:00
parent da123016ca
commit 6f81bd6a4e
1 changed files with 6 additions and 2 deletions
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8
kernel/rcu/rcutorture.c
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@ -2905,8 +2905,10 @@ rcu_torture_cleanup(void)
int i; int i;
if (torture_cleanup_begin()) { if (torture_cleanup_begin()) {
if (cur_ops->cb_barrier != NULL) if (cur_ops->cb_barrier != NULL) {
pr_info("%s: Invoking %pS().\n", __func__, cur_ops->cb_barrier);
cur_ops->cb_barrier(); cur_ops->cb_barrier();
}
return; return;
} }
if (!cur_ops) { if (!cur_ops) {
@ -2961,8 +2963,10 @@ rcu_torture_cleanup(void)
* Wait for all RCU callbacks to fire, then do torture-type-specific * Wait for all RCU callbacks to fire, then do torture-type-specific
* cleanup operations. * cleanup operations.
*/ */
if (cur_ops->cb_barrier != NULL) if (cur_ops->cb_barrier != NULL) {
pr_info("%s: Invoking %pS().\n", __func__, cur_ops->cb_barrier);
cur_ops->cb_barrier(); cur_ops->cb_barrier();
}
if (cur_ops->cleanup != NULL) if (cur_ops->cleanup != NULL)
cur_ops->cleanup(); cur_ops->cleanup();