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rcutorture: Make RCU Tasks Trace track Reader Batches

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This commit adds the ->get_sp_seq and ->gp_diff fields to the
tasks_tracing_ops structure so that RCU Tasks Trace rcutorture runs will
track Reader Batch.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2026-07-08 17:34:07 -07:00
parent 560b35bd7c
commit 86fa5387b4
3 changed files with 11 additions and 1 deletions
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3
include/linux/rcupdate_trace.h
View File

@ -198,10 +198,13 @@ static inline void rcu_tasks_trace_expedite_current(void)
srcu_expedite_current(&rcu_tasks_trace_srcu_struct);
}
unsigned long rcu_tasks_trace_batches_completed(void);
// Placeholders to enable stepwise transition.
void __init rcu_tasks_trace_suppress_unused(void);
#else
static inline unsigned long rcu_tasks_trace_batches_completed(void) { return 0; }
/*
* The BPF JIT forms these addresses even when it doesn't call these
* functions, so provide definitions that result in runtime errors.

3
kernel/rcu/rcutorture.c
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@ -1252,7 +1252,8 @@ static struct rcu_torture_ops tasks_tracing_ops = {
.read_delay = srcu_read_delay, /* just reuse srcu's version. */
.readunlock = tasks_tracing_torture_read_unlock,
.readlock_held = rcu_read_lock_trace_held,
.get_gp_seq = rcu_no_completed,
.get_gp_seq = rcu_tasks_trace_batches_completed,
.gp_diff = rcu_seq_diff,
.deferred_free = rcu_tasks_tracing_torture_deferred_free,
.sync = synchronize_rcu_tasks_trace,
.exp_sync = synchronize_rcu_tasks_trace,

6
kernel/rcu/tasks.h
View File

@ -1606,4 +1606,10 @@ static inline void rcu_tasks_bootup_oddness(void) {}
DEFINE_SRCU_FAST(rcu_tasks_trace_srcu_struct);
EXPORT_SYMBOL_GPL(rcu_tasks_trace_srcu_struct);
unsigned long rcu_tasks_trace_batches_completed(void)
{
return srcu_batches_completed(&rcu_tasks_trace_srcu_struct);
}
EXPORT_SYMBOL_GPL(rcu_tasks_trace_batches_completed);
#endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */