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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-07-21 00:27:32 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-07-25 01:04:19 +0200 |
| commit | f34c8585ed70f0f9b5ff9cf59c0dd533cddb975f (patch) | |
| tree | 1837b859d9d6c4386ac2c40c0c9c7fdc8fe52382 /kernel/rcu | |
| parent | rcu: Add last-CPU to GP-kthread starvation messages (diff) | |
| download | linux-f34c8585ed70f0f9b5ff9cf59c0dd533cddb975f.tar.xz linux-f34c8585ed70f0f9b5ff9cf59c0dd533cddb975f.zip | |
rcutorture: Invoke call_rcu() from timer handler
The Linux kernel invokes call_rcu() from various interrupt/softirq
handlers, but rcutorture does not. This commit therefore adds this
behavior to rcutorture's repertoire.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 6e3f644280ee..0efd69b2fb8c 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1080,6 +1080,11 @@ rcu_torture_fakewriter(void *arg) return 0; } +static void rcu_torture_timer_cb(struct rcu_head *rhp) +{ + kfree(rhp); +} + /* * RCU torture reader from timer handler. Dereferences rcu_torture_current, * incrementing the corresponding element of the pipeline array. The @@ -1142,6 +1147,14 @@ static void rcu_torture_timer(unsigned long unused) __this_cpu_inc(rcu_torture_batch[completed]); preempt_enable(); cur_ops->readunlock(idx); + + /* Test call_rcu() invocation from interrupt handler. */ + if (cur_ops->call) { + struct rcu_head *rhp = kmalloc(sizeof(*rhp), GFP_NOWAIT); + + if (rhp) + cur_ops->call(rhp, rcu_torture_timer_cb); + } } /* |