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From: Ingo Molnar <mingo@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	Daniel Bristot de Oliveira <bristot@redhat.com>,
	linux-kernel@vger.kernel.org,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	"H. Peter Anvin" <hpa@zytor.com>, Tony Luck <tony.luck@intel.com>,
	Borislav Petkov <bp@alien8.de>,
	Dou Liyang <douly.fnst@cn.fujitsu.com>,
	Nicolai Stange <nicstange@gmail.com>,
	Gu Zheng <guz.fnst@cn.fujitsu.com>, Baoquan He <bhe@redhat.com>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	Claudio Fontana <claudio.fontana@huawei.com>,
	Aaron Lu <aaron.lu@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Wanpeng Li <wanpeng.li@hotmail.com>,
	Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>,
	linux-edac@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH] x86, trace: Add __irq_entry annotation to x86's platform IRQ handlers
Date: Thu, 5 Jan 2017 08:59:14 +0100	[thread overview]
Message-ID: <20170105075914.GB2098@gmail.com> (raw)
In-Reply-To: <20170104100800.334a9a0e@gandalf.local.home>


* Steven Rostedt <rostedt@goodmis.org> wrote:

> On Wed,  4 Jan 2017 12:20:33 +0100
> Daniel Bristot de Oliveira <bristot@redhat.com> wrote:
> 
> > This patch adds the __irq_entry annotation to the defaults x86's
> > platform IRQ handlers. ftrace's function_graph tracer uses the
> > __irq_entry annotation to notify the entry and return of IRQ
> > handlers.
> > 
> > For example, before the patch:
> >   354549.667252 |   3)  d..1              |  default_idle_call() {
> >   354549.667252 |   3)  d..1              |    arch_cpu_idle() {
> >   354549.667253 |   3)  d..1              |      default_idle() {
> >   354549.696886 |   3)  d..1              |        smp_trace_reschedule_interrupt() {
> >   354549.696886 |   3)  d..1              |          irq_enter() {
> >   354549.696886 |   3)  d..1              |            rcu_irq_enter() {
> > 
> > After the patch:
> >   366416.254476 |   3)  d..1              |    arch_cpu_idle() {
> >   366416.254476 |   3)  d..1              |      default_idle() {
> >   366416.261566 |   3)  d..1  ==========> |
> >   366416.261566 |   3)  d..1              |        smp_trace_reschedule_interrupt() {
> >   366416.261566 |   3)  d..1              |          irq_enter() {
> >   366416.261566 |   3)  d..1              |            rcu_irq_enter() {
> > 
> > KASAN also uses this annotation. The smp_apic_timer_interrupt
> > was already annotated.
> 
> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> 
> Thomas or Ingo, want to take this in tip?

Yeah, queued it up for v4.11.

Thanks,

	Ingo

  reply	other threads:[~2017-01-05  7:59 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-04 11:20 Daniel Bristot de Oliveira
2017-01-04 15:08 ` Steven Rostedt
2017-01-05  7:59   ` Ingo Molnar [this message]
2017-01-05 15:05 ` [tip:x86/irq] x86/irq, " tip-bot for Daniel Bristot de Oliveira

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