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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-05-29 17:50:51 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-07-02 12:34:04 -0700 |
| commit | 72472a02a9c4507ef54d03d71bb253c26015f52c (patch) | |
| tree | b3aedcd9fc67357054b329548cd4cd001f36f6a9 /kernel | |
| parent | 143aa672f4fc643420c8325ad09c379ed33a27cf (diff) | |
| download | linux-72472a02a9c4507ef54d03d71bb253c26015f52c.tar.gz linux-72472a02a9c4507ef54d03d71bb253c26015f52c.tar.bz2 linux-72472a02a9c4507ef54d03d71bb253c26015f52c.zip | |
rcu: Make rcutorture fakewriters invoke rcu_barrier()
The current rcutorture rcu_barrier() testing never intentionally runs
more than one instance of rcu_barrier() at a given time. This fails
to test the the shiny new concurrency features of rcu_barrier(). This
commit therefore modifies the rcutorture fakewriter kthread to randomly
invoke rcu_barrier() rather than the usual synchronize_rcu().
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcutorture.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index 045a3dc233ea..c279ee920947 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -1025,7 +1025,11 @@ rcu_torture_fakewriter(void *arg) do { schedule_timeout_uninterruptible(1 + rcu_random(&rand)%10); udelay(rcu_random(&rand) & 0x3ff); - cur_ops->sync(); + if (cur_ops->cb_barrier != NULL && + rcu_random(&rand) % (nfakewriters * 8) == 0) + cur_ops->cb_barrier(); + else + cur_ops->sync(); rcu_stutter_wait("rcu_torture_fakewriter"); } while (!kthread_should_stop() && fullstop == FULLSTOP_DONTSTOP); |