void verbose_torout_sleep(void);
/* Definitions for online/offline exerciser. */
+#ifdef CONFIG_HOTPLUG_CPU
+int torture_num_online_cpus(void);
+#else /* #ifdef CONFIG_HOTPLUG_CPU */
+static inline int torture_num_online_cpus(void) { return 1; }
+#endif /* #else #ifdef CONFIG_HOTPLUG_CPU */
typedef void torture_ofl_func(void);
bool torture_offline(int cpu, long *n_onl_attempts, long *n_onl_successes,
unsigned long *sum_offl, int *min_onl, int *max_onl);
struct torture_random_state *trsp)
{
unsigned long loops;
- int noc = num_online_cpus();
+ int noc = torture_num_online_cpus();
int rdrchked;
int rdrchker;
struct rcu_torture_reader_check *rtrcp; // Me.
torture_hrtimeout_us(500, 1000, &rand);
lastsleep = jiffies + 10;
}
- while (num_online_cpus() < mynumonline && !torture_must_stop())
+ while (torture_num_online_cpus() < mynumonline && !torture_must_stop())
schedule_timeout_interruptible(HZ / 5);
stutter_wait("rcu_torture_reader");
} while (!torture_must_stop());
static int min_online = -1;
static int max_online;
+static int torture_online_cpus = NR_CPUS;
+
+/*
+ * Some torture testing leverages confusion as to the number of online
+ * CPUs. This function returns the torture-testing view of this number,
+ * which allows torture tests to load-balance appropriately.
+ */
+int torture_num_online_cpus(void)
+{
+ return READ_ONCE(torture_online_cpus);
+}
+EXPORT_SYMBOL_GPL(torture_num_online_cpus);
+
/*
* Attempt to take a CPU offline. Return false if the CPU is already
* offline or if it is not subject to CPU-hotplug operations. The
*min_offl = delta;
if (*max_offl < delta)
*max_offl = delta;
+ WRITE_ONCE(torture_online_cpus, torture_online_cpus - 1);
+ WARN_ON_ONCE(torture_online_cpus <= 0);
}
return true;
*min_onl = delta;
if (*max_onl < delta)
*max_onl = delta;
+ WRITE_ONCE(torture_online_cpus, torture_online_cpus + 1);
}
return true;