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[tip/core/rcu,13/55] rcu: Don't destroy rcu_torture_boost() callback until it is done

Message ID 1315332049-2604-13-git-send-email-paulmck@linux.vnet.ibm.com
State Accepted
Commit 9d68197c05201d8edc70d58bd1d5dad05d8455e8
Headers show

Commit Message

Paul E. McKenney Sept. 6, 2011, 6 p.m. UTC 
From: Paul E. McKenney <paul.mckenney@linaro.org>

The rcu_torture_boost() cleanup code destroyed debug-objects state before
waiting for the last RCU callback to be invoked, resulting in rare but
very real debug-objects warnings.  Move the destruction to after the
waiting to fix this problem.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
 kernel/rcutorture.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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Patch

diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index e0f39ea..1194d6c 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -796,11 +796,11 @@  checkwait:	rcu_stutter_wait("rcu_torture_boost");
 
 	/* Clean up and exit. */
 	VERBOSE_PRINTK_STRING("rcu_torture_boost task stopping");
-	destroy_rcu_head_on_stack(&rbi.rcu);
 	rcutorture_shutdown_absorb("rcu_torture_boost");
 	while (!kthread_should_stop() || rbi.inflight)
 		schedule_timeout_uninterruptible(1);
 	smp_mb(); /* order accesses to ->inflight before stack-frame death. */
+	destroy_rcu_head_on_stack(&rbi.rcu);
 	return 0;
 }