From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valentin Schneider Date: Fri, 07 Oct 2022 15:45:32 +0000 Subject: [RFC PATCH 4/5] irq_work: Trace calls to arch_irq_work_raise() Message-Id: <20221007154533.1878285-4-vschneid@redhat.com> List-Id: References: <20221007154145.1877054-1-vschneid@redhat.com> In-Reply-To: <20221007154145.1877054-1-vschneid@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, x86@kernel.org Cc: "Paul E. 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" Adding a tracepoint to send_call_function_single_ipi() covers irq_work_queue_on() when the CPU isn't the local one - add a tracepoint to irq_work_raise() to cover the other cases. Signed-off-by: Valentin Schneider --- kernel/irq_work.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/kernel/irq_work.c b/kernel/irq_work.c index 7afa40fe5cc4..5a550b681878 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -22,6 +22,8 @@ #include #include +#include + static DEFINE_PER_CPU(struct llist_head, raised_list); static DEFINE_PER_CPU(struct llist_head, lazy_list); static DEFINE_PER_CPU(struct task_struct *, irq_workd); @@ -74,6 +76,14 @@ void __weak arch_irq_work_raise(void) */ } +static inline void irq_work_raise(void) +{ + if (arch_irq_work_has_interrupt()) + trace_ipi_send_cpu(_RET_IP_, smp_processor_id()); + + arch_irq_work_raise(); +} + /* Enqueue on current CPU, work must already be claimed and preempt disabled */ static void __irq_work_queue_local(struct irq_work *work) { @@ -99,7 +109,7 @@ static void __irq_work_queue_local(struct irq_work *work) /* If the work is "lazy", handle it from next tick if any */ if (!lazy_work || tick_nohz_tick_stopped()) - arch_irq_work_raise(); + irq_work_raise(); } /* Enqueue the irq work @work on the current CPU */ -- 2.31.1