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McKenney" , Steven Rostedt , Peter Zijlstra , Thomas Gleixner , Sebastian Andrzej Siewior , Juri Lelli , Daniel Bristot de Oliveira , Marcelo Tosatti , Frederic Weisbecker , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Marc Zyngier , Mark Rutland , Russell King , Nicholas Piggin , Guo Ren , "David S. Miller" Subject: [RFC PATCH v2 4/8] smp: Trace IPIs sent via arch_send_call_function_ipi_mask() Date: Wed, 2 Nov 2022 18:33:32 +0000 Message-Id: <20221102183336.3120536-3-vschneid@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221102182949.3119584-1-vschneid@redhat.com> References: <20221102182949.3119584-1-vschneid@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 --- kernel/smp.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/kernel/smp.c b/kernel/smp.c index e2ca1e2f31274..c4d561cf50d45 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -160,6 +160,13 @@ void __init call_function_init(void) smpcfd_prepare_cpu(smp_processor_id()); } =20 +static inline void +send_call_function_ipi_mask(const struct cpumask *mask) +{ + trace_ipi_send_cpumask(mask, _RET_IP_, func); + arch_send_call_function_ipi_mask(mask); +} + #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG =20 static DEFINE_STATIC_KEY_FALSE(csdlock_debug_enabled); @@ -970,7 +977,7 @@ static void smp_call_function_many_cond(const struct cp= umask *mask, if (nr_cpus =3D=3D 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); =20 cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->pinged, this_cpu, CFD_SEQ_NO= CPU, CFD_SEQ_PINGED); } --=20 2.31.1