From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valentin Schneider Subject: [RFC PATCH 4/5] irq_work: Trace calls to arch_irq_work_raise() Date: Fri, 7 Oct 2022 16:45:32 +0100 Message-ID: <20221007154533.1878285-4-vschneid@redhat.com> References: <20221007154145.1877054-1-vschneid@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CU1pSi/Mf0DrQjqZ5hCAmcD7OU2umaFSSLLUkxBjP58=; b=pwT89j3EyIZqX/ kM0Zo/txp9nafRjh9gn2Ec3X4qqBOR5s7u5oKX0c8U2TVwtGkb83ITBYKJwTObRtMTJRMxfOl3GKI wYaqbPpGvXUC6HwxVye3nNADKx3f3+N/z+KJkzMGi3a93RnZ7eiCUAsZrSn9r4S2PLD8XUvnqH05Q uuHPFIIZGiVrIWg8IcoB5PAgze6laS6f5ntc5otMaOWk3aPkXPuYOmgCLNxMHJj3KR2pWy6qKeDFX IdADkgtrr56BNwDHsDFIug53R8Pzbe49GgIyTpe0qU9FQJlX3AGB7bA/mOc7I8GQSYm3uFiE+lPGf k4w9xjz3n0UH8d+l13Ww==; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665157570; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=V8NlfJJNnBH1Hg+bNlEeNOaLSp643edXbrFkYOuHdj0=; b=bQ6hPGYo4FsYj8QPFvMdssGyeKTiMFuyGpseGcUi9Oz5qPshPYgmoNZvvM0C9Yy7STerd5 jO9HKBjAWMyU/b5ngjI6kx7AO/3SYiWmrLNLyzRjyKX7L2n6uJJVfClXAn6+9fSg0qTvQE Qy1MIzSF9ygKP5Lbmbgz3i4ytg0qX0E= In-Reply-To: <20221007154145.1877054-1-vschneid@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+glpr-linux-riscv=m.gmane-mx.org@lists.infradead.org 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