Commit 08407b5f authored by Valentin Schneider's avatar Valentin Schneider Committed by Peter Zijlstra
Browse files

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: default avatarValentin Schneider <vschneid@redhat.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20230307143558.294354-4-vschneid@redhat.com
parent cc9cb0a7

kernel/smp.c

+8 −1
Original line number Diff line number Diff line
@@ -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))) {