From: "Paul E. McKenney" <paul...@kernel.org> This commit adds a .stats function pointer to the rcu_scale_ops structure, and if this is non-NULL, it is invoked after stack traces are dumped in response to a rcu_scale_writer() stall.
Signed-off-by: "Paul E. McKenney" <paul...@kernel.org> Signed-off-by: Neeraj Upadhyay <neeraj.upadh...@kernel.org> --- kernel/rcu/rcuscale.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 5087ca7062d9..1b9a43653d7e 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -145,6 +145,7 @@ struct rcu_scale_ops { void (*sync)(void); void (*exp_sync)(void); struct task_struct *(*rso_gp_kthread)(void); + void (*stats)(void); const char *name; }; @@ -226,6 +227,11 @@ static void srcu_scale_synchronize(void) synchronize_srcu(srcu_ctlp); } +static void srcu_scale_stats(void) +{ + srcu_torture_stats_print(srcu_ctlp, scale_type, SCALE_FLAG); +} + static void srcu_scale_synchronize_expedited(void) { synchronize_srcu_expedited(srcu_ctlp); @@ -243,6 +249,7 @@ static struct rcu_scale_ops srcu_ops = { .gp_barrier = srcu_rcu_barrier, .sync = srcu_scale_synchronize, .exp_sync = srcu_scale_synchronize_expedited, + .stats = srcu_scale_stats, .name = "srcu" }; @@ -272,6 +279,7 @@ static struct rcu_scale_ops srcud_ops = { .gp_barrier = srcu_rcu_barrier, .sync = srcu_scale_synchronize, .exp_sync = srcu_scale_synchronize_expedited, + .stats = srcu_scale_stats, .name = "srcud" }; @@ -563,6 +571,8 @@ rcu_scale_writer(void *arg) pr_info("%s: Task %ld flags writer %d:\n", __func__, me, i); sched_show_task(writer_tasks[i]); } + if (cur_ops->stats) + cur_ops->stats(); } } if (started && !alldone && i < MAX_MEAS - 1) -- 2.40.1