From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6578BC3B186 for ; Tue, 11 Feb 2020 13:11:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1CE5E20637 for ; Tue, 11 Feb 2020 13:11:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="N/Wr7nLC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728904AbgBKNLW (ORCPT ); Tue, 11 Feb 2020 08:11:22 -0500 Received: from merlin.infradead.org ([205.233.59.134]:59270 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727567AbgBKNLW (ORCPT ); Tue, 11 Feb 2020 08:11:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=H9mWH9EBWo8G56uksk1V/QpGUCJTJd0A9l8b0DFB9cE=; b=N/Wr7nLCnImSr7kTtQ2oARHaWQ 6HExFan63tIT5zpyiosx7xPNq9vFSEWvsWk6v0AoKakRnkZsF4G6mofN2e9NHMYa/2Uo4f+QAi3+L M3sBi5KliVAhc4NykRmn5/d2Q7mWy+Hdnitatoij0J1Qmnz3hXcB3g1L0U19/ix2uditN/CnYyPD+ PA+gkb/m5u7gr3UEoqTs9P8PHf5sDMUo18bnxehSN+vWakb5ntzQ4QFlwUpsjr0J7fwTDO7/yPmyt zdUd1cf4RkLyCpeSrMBJYpzV/ZHpjWrCtAH88oVMlnu+Eo1mgpsCnUp6cXkyXPNaC2bRZdIjSZY+v YJKkfP9w==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1VJQ-0003no-K0; Tue, 11 Feb 2020 13:10:48 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 4FA7330066E; Tue, 11 Feb 2020 14:08:58 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id BF92E20148940; Tue, 11 Feb 2020 14:10:46 +0100 (CET) Date: Tue, 11 Feb 2020 14:10:46 +0100 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Steven Rostedt , LKML , Ingo Molnar , "Joel Fernandes (Google)" , Greg Kroah-Hartman , "Gustavo A. R. Silva" , Thomas Gleixner , Josh Triplett , Mathieu Desnoyers , Lai Jiangshan Subject: Re: [PATCH] tracing/perf: Move rcu_irq_enter/exit_irqson() to perf trace point hook Message-ID: <20200211131046.GR14914@hirez.programming.kicks-ass.net> References: <20200210170643.3544795d@gandalf.local.home> <20200211114954.GK14914@hirez.programming.kicks-ass.net> <20200211125929.GG2935@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200211125929.GG2935@paulmck-ThinkPad-P72> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 11, 2020 at 04:59:29AM -0800, Paul E. McKenney wrote: > However, a quick grep for NMI_MASK didn't show me the NMI_MASK bit > getting set. Help? | #define nmi_enter() \ | do { \ | arch_nmi_enter(); \ | printk_nmi_enter(); \ | lockdep_off(); \ | ftrace_nmi_enter(); \ | BUG_ON(in_nmi()); \ | preempt_count_add(NMI_OFFSET + HARDIRQ_OFFSET); \ ^^^^ right there | rcu_nmi_enter(); \ | trace_hardirq_enter(); \ | } while (0)