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_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 A1DF9C433DF for ; Wed, 20 May 2020 18:50:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D054206C3 for ; Wed, 20 May 2020 18:50:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="OIMaAXT+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726727AbgETSuM (ORCPT ); Wed, 20 May 2020 14:50:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726688AbgETSuL (ORCPT ); Wed, 20 May 2020 14:50:11 -0400 Received: from mail-lf1-x144.google.com (mail-lf1-x144.google.com [IPv6:2a00:1450:4864:20::144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86DB8C061A0E; Wed, 20 May 2020 11:50:11 -0700 (PDT) Received: by mail-lf1-x144.google.com with SMTP id c21so2974056lfb.3; Wed, 20 May 2020 11:50:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=CbVGwxZLKRnq0rt2K9zGYbx9SxMA/Df1UT34H3Wxb5o=; b=OIMaAXT+9JBJiT8OHcFcbjovt6et1jVWHkFoETHTBiCZMW4Vi20WOh0SvQmBUgopk5 K9QDFPkQf0PTEPJ5ykUF1Xv/W1cJSqECeObDaZbDm5C94GX9lpONVdMm1ZeBB+5ombQp HktBd/JAWQHA+gx32bRgJrnLzUkgEgW0FZJ6YR4KDtP8bllG5izU14G5oL7JZEviy2tK ONWmfZeiACSBoiiYdT3QFB8VcFMAdJj5nNNS6kMmZeyeqf5FTk64gWQO9dBz/AJLFOWs YLhfQ36PGLaa+jCx7CzdGsN3j1E9xoxY8r3pUiOWlJJ4q1aaKJ3tRly6AVB/zuVOksT4 Tgyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:date:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=CbVGwxZLKRnq0rt2K9zGYbx9SxMA/Df1UT34H3Wxb5o=; b=lwMxpr6bzNBU1PtQ4oNVCO9cEh1RDZ6jTTHRMv76j/N1rMGciCaGfaJ38sDKbca7wo VkrwjxW+xsCBqYieIQGi1H/aDZrrILS+vMwIwVkjLXuMw6q4fmBxQJWGDX6fGPJU32AI 8QpG/N+AuMcdrB2IXR6AcMepAfrFueptjV7bonie5ozBXhvFUuJh5+zEjH+ubANdRDZF jYfJckUvyoZddXUtWNsHeC/lggUDbILgG4FzmpxOHaJhpMwDII2/fuEXu+Uhm93dc2dv pO54/cj2tXIne9e/S3b4w4KIUur1bv5p6TJEW+hgigrFfV9LvKCe/zYfEGRXkwO73mHD /3Jg== X-Gm-Message-State: AOAM533pkMoc7SbBP4LVw4HpYpEE93fuIbt7HBN+ncwzQe3zeHaXK36X LcHGnkR/CnOQMc0pGmc9BHE= X-Google-Smtp-Source: ABdhPJzpl4cwsHJZrldCeqPRZ1d0ahOVRjNHMLD4ClVO0veKadPYOdybhNiaHr3HOaCN/QkVaExVTQ== X-Received: by 2002:ac2:550a:: with SMTP id j10mr3199303lfk.46.1590000609975; Wed, 20 May 2020 11:50:09 -0700 (PDT) Received: from pc636 (h5ef52e31.seluork.dyn.perspektivbredband.net. [94.245.46.49]) by smtp.gmail.com with ESMTPSA id h15sm1221227ljj.10.2020.05.20.11.50.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2020 11:50:07 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Wed, 20 May 2020 20:50:05 +0200 To: Joel Fernandes Cc: Peter Zijlstra , Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, Ingo Molnar , Steven Rostedt , Will Deacon , Thomas Gleixner , "Paul E . McKenney" , Linus Torvalds , Lai Jiangshan , Josh Triplett , Mathieu Desnoyers , rcu@vger.kernel.org Subject: Re: [PATCH 3/8] srcu: Use local_lock() for per-CPU struct srcu_data access Message-ID: <20200520185005.GA15928@pc636> References: <20200519201912.1564477-1-bigeasy@linutronix.de> <20200519201912.1564477-4-bigeasy@linutronix.de> <20200520102407.GF317569@hirez.programming.kicks-ass.net> <20200520120608.mwros5jurmidxxfv@linutronix.de> <20200520174259.GA247557@google.com> <20200520182800.sdp6t6bgbhn4kkqk@linutronix.de> <20200520183529.GR317569@hirez.programming.kicks-ass.net> <20200520184425.GA261674@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200520184425.GA261674@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org > > I actually found it in RT 4.4 kernel, I thought this was also on newer RT > kernels as well (is that not true anymore?). But yes it was exactly what > Peter said. > I see it also in 5.6.4 linut-rt-devel: #ifdef CONFIG_PREEMPT_RT ... # define get_local_ptr(var) ({ \ migrate_disable(); \ this_cpu_ptr(var); }) ... -- Vlad Rezki