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Date: Thu, 14 May 2020 21:37:03 -0400 From: Steven Rostedt <rostedt@...dmis.org> To: Thomas Gleixner <tglx@...utronix.de> Cc: LKML <linux-kernel@...r.kernel.org>, x86@...nel.org, "Paul E. McKenney" <paulmck@...nel.org>, Andy Lutomirski <luto@...nel.org>, Alexandre Chartre <alexandre.chartre@...cle.com>, Frederic Weisbecker <frederic@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <sean.j.christopherson@...el.com>, Masami Hiramatsu <mhiramat@...nel.org>, Petr Mladek <pmladek@...e.com>, Joel Fernandes <joel@...lfernandes.org>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Juergen Gross <jgross@...e.com>, Brian Gerst <brgerst@...il.com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Josh Poimboeuf <jpoimboe@...hat.com>, Will Deacon <will@...nel.org>, Tom Lendacky <thomas.lendacky@....com>, Wei Liu <wei.liu@...nel.org>, Michael Kelley <mikelley@...rosoft.com>, Jason Chen CJ <jason.cj.chen@...el.com>, Zhao Yakui <yakui.zhao@...el.com>, "Peter Zijlstra (Intel)" <peterz@...radead.org> Subject: Re: [patch V5 03/38] nmi, tracing: Provide nmi_enter/exit_notrace() On Thu, 14 May 2020 21:35:22 -0400 Steven Rostedt <rostedt@...dmis.org> wrote: > On Thu, 14 May 2020 21:32:30 -0400 > Steven Rostedt <rostedt@...dmis.org> wrote: > > > It's accounting only. Now it does use a per-cpu variable (which I see > > in other patches can be an issue) and calls time_get(). > > time_get() being defined as trace_clock_local(). And this in only > called if CONFIG_GENERIC_SCHED_CLOCK is not true, as that isn't NMI > safe. > Forget what I said. After reading the next patch, this makes much more sense. ;-) Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org> -- Steve
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