The following commit has been merged into the smp/core branch of tip:
Commit-ID: 08407b5f61c1bbd4ebb26a76474df4354fd76fb7
Gitweb: https://git.kernel.org/tip/08407b5f61c1bbd4ebb26a76474df4354fd76fb7
Author: Valentin Schneider <vschneid@xxxxxxxxxx>
AuthorDate: Tue, 07 Mar 2023 14:35:54
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 24 Mar 2023 11:01:27 +01:00
smp: Trace IPIs sent via arch_send_call_function_ipi_mask()
This simply wraps around the arch function and prepends it with a
tracepoint, similar to send_call_function_single_ipi().
Signed-off-by: Valentin Schneider <vschneid@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230307143558.294354-4-vschneid@xxxxxxxxxx
---
kernel/smp.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/kernel/smp.c b/kernel/smp.c
index 770e879..03e6d57 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -103,6 +103,13 @@ void __init call_function_init(void)
smpcfd_prepare_cpu(smp_processor_id());
}
+static __always_inline void
+send_call_function_ipi_mask(struct cpumask *mask)
+{
+ trace_ipi_send_cpumask(mask, _RET_IP_, NULL);
+ arch_send_call_function_ipi_mask(mask);
+}
+
#ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
static DEFINE_STATIC_KEY_MAYBE(CONFIG_CSD_LOCK_WAIT_DEBUG_DEFAULT, csdlock_debug_enabled);
@@ -762,7 +769,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask,
if (nr_cpus == 1)
send_call_function_single_ipi(last_cpu);
else if (likely(nr_cpus > 1))
- arch_send_call_function_ipi_mask(cfd->cpumask_ipi);
+ send_call_function_ipi_mask(cfd->cpumask_ipi);
}
if (run_local && (!cond_func || cond_func(this_cpu, info))) {
|