rcutorture: Make rcutorture support print rcu-tasks gp state
This commit make rcu-tasks related rcutorture test support rcu-tasks gp state printing when the writer stall occurs or the at the end of rcutorture test, and generate rcu_ops->get_gp_data() operation to simplify the acquisition of gp state for different types of rcutorture tests. Signed-off-by: Zqiang <qiang.zhang1211@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
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@ -522,12 +522,18 @@ static inline void show_rcu_tasks_gp_kthreads(void) {}
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#ifdef CONFIG_TASKS_RCU
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struct task_struct *get_rcu_tasks_gp_kthread(void);
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void rcu_tasks_get_gp_data(int *flags, unsigned long *gp_seq);
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#endif // # ifdef CONFIG_TASKS_RCU
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#ifdef CONFIG_TASKS_RUDE_RCU
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struct task_struct *get_rcu_tasks_rude_gp_kthread(void);
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void rcu_tasks_rude_get_gp_data(int *flags, unsigned long *gp_seq);
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#endif // # ifdef CONFIG_TASKS_RUDE_RCU
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#ifdef CONFIG_TASKS_TRACE_RCU
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void rcu_tasks_trace_get_gp_data(int *flags, unsigned long *gp_seq);
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#endif
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#ifdef CONFIG_TASKS_RCU_GENERIC
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void tasks_cblist_init_generic(void);
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#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
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@ -557,8 +563,7 @@ static inline void rcu_set_jiffies_lazy_flush(unsigned long j) { }
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#endif
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#if defined(CONFIG_TREE_RCU)
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void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
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unsigned long *gp_seq);
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void rcutorture_get_gp_data(int *flags, unsigned long *gp_seq);
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void do_trace_rcu_torture_read(const char *rcutorturename,
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struct rcu_head *rhp,
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unsigned long secs,
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@ -566,8 +571,7 @@ void do_trace_rcu_torture_read(const char *rcutorturename,
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unsigned long c);
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void rcu_gp_set_torture_wait(int duration);
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#else
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static inline void rcutorture_get_gp_data(enum rcutorture_type test_type,
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int *flags, unsigned long *gp_seq)
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static inline void rcutorture_get_gp_data(int *flags, unsigned long *gp_seq)
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{
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*flags = 0;
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*gp_seq = 0;
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@ -587,20 +591,16 @@ static inline void rcu_gp_set_torture_wait(int duration) { }
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#ifdef CONFIG_TINY_SRCU
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static inline void srcutorture_get_gp_data(enum rcutorture_type test_type,
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struct srcu_struct *sp, int *flags,
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static inline void srcutorture_get_gp_data(struct srcu_struct *sp, int *flags,
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unsigned long *gp_seq)
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{
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if (test_type != SRCU_FLAVOR)
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return;
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*flags = 0;
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*gp_seq = sp->srcu_idx;
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}
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#elif defined(CONFIG_TREE_SRCU)
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void srcutorture_get_gp_data(enum rcutorture_type test_type,
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struct srcu_struct *sp, int *flags,
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void srcutorture_get_gp_data(struct srcu_struct *sp, int *flags,
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unsigned long *gp_seq);
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#endif
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@ -381,6 +381,7 @@ struct rcu_torture_ops {
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void (*gp_kthread_dbg)(void);
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bool (*check_boost_failed)(unsigned long gp_state, int *cpup);
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int (*stall_dur)(void);
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void (*get_gp_data)(int *flags, unsigned long *gp_seq);
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long cbflood_max;
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int irq_capable;
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int can_boost;
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@ -569,6 +570,7 @@ static struct rcu_torture_ops rcu_ops = {
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.gp_kthread_dbg = show_rcu_gp_kthreads,
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.check_boost_failed = rcu_check_boost_fail,
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.stall_dur = rcu_jiffies_till_stall_check,
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.get_gp_data = rcutorture_get_gp_data,
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.irq_capable = 1,
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.can_boost = IS_ENABLED(CONFIG_RCU_BOOST),
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.extendables = RCUTORTURE_MAX_EXTEND,
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@ -628,6 +630,11 @@ static struct srcu_struct srcu_ctld;
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static struct srcu_struct *srcu_ctlp = &srcu_ctl;
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static struct rcu_torture_ops srcud_ops;
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static void srcu_get_gp_data(int *flags, unsigned long *gp_seq)
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{
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srcutorture_get_gp_data(srcu_ctlp, flags, gp_seq);
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}
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static int srcu_torture_read_lock(void)
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{
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if (cur_ops == &srcud_ops)
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@ -736,6 +743,7 @@ static struct rcu_torture_ops srcu_ops = {
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.call = srcu_torture_call,
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.cb_barrier = srcu_torture_barrier,
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.stats = srcu_torture_stats,
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.get_gp_data = srcu_get_gp_data,
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.cbflood_max = 50000,
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.irq_capable = 1,
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.no_pi_lock = IS_ENABLED(CONFIG_TINY_SRCU),
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@ -774,6 +782,7 @@ static struct rcu_torture_ops srcud_ops = {
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.call = srcu_torture_call,
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.cb_barrier = srcu_torture_barrier,
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.stats = srcu_torture_stats,
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.get_gp_data = srcu_get_gp_data,
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.cbflood_max = 50000,
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.irq_capable = 1,
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.no_pi_lock = IS_ENABLED(CONFIG_TINY_SRCU),
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@ -882,6 +891,7 @@ static struct rcu_torture_ops tasks_ops = {
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.call = call_rcu_tasks,
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.cb_barrier = rcu_barrier_tasks,
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.gp_kthread_dbg = show_rcu_tasks_classic_gp_kthread,
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.get_gp_data = rcu_tasks_get_gp_data,
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.fqs = NULL,
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.stats = NULL,
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.irq_capable = 1,
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@ -922,6 +932,7 @@ static struct rcu_torture_ops tasks_rude_ops = {
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.call = call_rcu_tasks_rude,
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.cb_barrier = rcu_barrier_tasks_rude,
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.gp_kthread_dbg = show_rcu_tasks_rude_gp_kthread,
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.get_gp_data = rcu_tasks_rude_get_gp_data,
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.cbflood_max = 50000,
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.fqs = NULL,
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.stats = NULL,
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@ -974,6 +985,7 @@ static struct rcu_torture_ops tasks_tracing_ops = {
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.call = call_rcu_tasks_trace,
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.cb_barrier = rcu_barrier_tasks_trace,
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.gp_kthread_dbg = show_rcu_tasks_trace_gp_kthread,
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.get_gp_data = rcu_tasks_trace_get_gp_data,
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.cbflood_max = 50000,
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.fqs = NULL,
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.stats = NULL,
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@ -2264,10 +2276,8 @@ rcu_torture_stats_print(void)
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int __maybe_unused flags = 0;
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unsigned long __maybe_unused gp_seq = 0;
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rcutorture_get_gp_data(cur_ops->ttype,
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&flags, &gp_seq);
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srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp,
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&flags, &gp_seq);
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if (cur_ops->get_gp_data)
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cur_ops->get_gp_data(&flags, &gp_seq);
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wtp = READ_ONCE(writer_task);
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pr_alert("??? Writer stall state %s(%d) g%lu f%#x ->state %#x cpu %d\n",
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rcu_torture_writer_state_getname(),
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@ -3390,8 +3400,8 @@ rcu_torture_cleanup(void)
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fakewriter_tasks = NULL;
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}
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rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
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srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
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if (cur_ops->get_gp_data)
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cur_ops->get_gp_data(&flags, &gp_seq);
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pr_alert("%s: End-test grace-period state: g%ld f%#x total-gps=%ld\n",
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cur_ops->name, (long)gp_seq, flags,
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rcutorture_seq_diff(gp_seq, start_gp_seq));
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@ -3762,8 +3772,8 @@ rcu_torture_init(void)
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nrealreaders = 1;
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}
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rcu_torture_print_module_parms(cur_ops, "Start of test");
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rcutorture_get_gp_data(cur_ops->ttype, &flags, &gp_seq);
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srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, &flags, &gp_seq);
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if (cur_ops->get_gp_data)
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cur_ops->get_gp_data(&flags, &gp_seq);
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start_gp_seq = gp_seq;
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pr_alert("%s: Start-test grace-period state: g%ld f%#x\n",
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cur_ops->name, (long)gp_seq, flags);
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@ -1826,12 +1826,9 @@ static void process_srcu(struct work_struct *work)
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srcu_reschedule(ssp, curdelay);
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}
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void srcutorture_get_gp_data(enum rcutorture_type test_type,
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struct srcu_struct *ssp, int *flags,
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void srcutorture_get_gp_data(struct srcu_struct *ssp, int *flags,
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unsigned long *gp_seq)
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{
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if (test_type != SRCU_FLAVOR)
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return;
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*flags = 0;
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*gp_seq = rcu_seq_current(&ssp->srcu_sup->srcu_gp_seq);
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}
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@ -1178,6 +1178,13 @@ struct task_struct *get_rcu_tasks_gp_kthread(void)
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}
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EXPORT_SYMBOL_GPL(get_rcu_tasks_gp_kthread);
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void rcu_tasks_get_gp_data(int *flags, unsigned long *gp_seq)
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{
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*flags = 0;
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*gp_seq = rcu_seq_current(&rcu_tasks.tasks_gp_seq);
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}
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EXPORT_SYMBOL_GPL(rcu_tasks_get_gp_data);
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/*
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* Protect against tasklist scan blind spot while the task is exiting and
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* may be removed from the tasklist. Do this by adding the task to yet
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@ -1358,6 +1365,13 @@ struct task_struct *get_rcu_tasks_rude_gp_kthread(void)
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}
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EXPORT_SYMBOL_GPL(get_rcu_tasks_rude_gp_kthread);
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void rcu_tasks_rude_get_gp_data(int *flags, unsigned long *gp_seq)
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{
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*flags = 0;
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*gp_seq = rcu_seq_current(&rcu_tasks_rude.tasks_gp_seq);
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}
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EXPORT_SYMBOL_GPL(rcu_tasks_rude_get_gp_data);
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#endif /* #ifdef CONFIG_TASKS_RUDE_RCU */
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////////////////////////////////////////////////////////////////////////
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@ -2010,6 +2024,13 @@ struct task_struct *get_rcu_tasks_trace_gp_kthread(void)
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}
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EXPORT_SYMBOL_GPL(get_rcu_tasks_trace_gp_kthread);
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void rcu_tasks_trace_get_gp_data(int *flags, unsigned long *gp_seq)
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{
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*flags = 0;
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*gp_seq = rcu_seq_current(&rcu_tasks_trace.tasks_gp_seq);
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}
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EXPORT_SYMBOL_GPL(rcu_tasks_trace_get_gp_data);
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#else /* #ifdef CONFIG_TASKS_TRACE_RCU */
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static void exit_tasks_rcu_finish_trace(struct task_struct *t) { }
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#endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */
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@ -508,17 +508,10 @@ static struct rcu_node *rcu_get_root(void)
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/*
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* Send along grace-period-related data for rcutorture diagnostics.
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*/
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void rcutorture_get_gp_data(enum rcutorture_type test_type, int *flags,
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unsigned long *gp_seq)
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void rcutorture_get_gp_data(int *flags, unsigned long *gp_seq)
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{
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switch (test_type) {
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case RCU_FLAVOR:
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*flags = READ_ONCE(rcu_state.gp_flags);
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*gp_seq = rcu_seq_current(&rcu_state.gp_seq);
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break;
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default:
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break;
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}
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*flags = READ_ONCE(rcu_state.gp_flags);
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*gp_seq = rcu_seq_current(&rcu_state.gp_seq);
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}
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EXPORT_SYMBOL_GPL(rcutorture_get_gp_data);
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