Commit d43f17a1 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

smp: Micro-optimize smp_call_function_many_cond() 



Call the generic send_call_function_single_ipi() function, which
will avoid the IPI when @last_cpu is idle.

Signed-off-by: default avatarPeter Zijlstra <peterz@infradead.org>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent a5aa5ce3

kernel/smp.c

+1 −1
Original line number Diff line number Diff line
@@ -694,7 +694,7 @@ static void smp_call_function_many_cond(const struct cpumask *mask, 
		 * provided mask.

		 */

		if (nr_cpus == 1)

			arch_send_call_function_single_ipi(last_cpu);

			send_call_function_single_ipi(last_cpu);

		else if (likely(nr_cpus > 1))

			arch_send_call_function_ipi_mask(cfd->cpumask_ipi);

	}