Received: by 10.192.165.148 with SMTP id m20csp4267223imm; Tue, 8 May 2018 05:54:59 -0700 (PDT) X-Google-Smtp-Source: AB8JxZoZleLEnvCtJ63pQGZG/7ekN4WmhpxuL0WJG9V3HoOs6zidmb5ao7BOZafCUzLd2HTzj0Ta X-Received: by 10.98.82.129 with SMTP id g123mr17353300pfb.22.1525784099246; Tue, 08 May 2018 05:54:59 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525784099; cv=none; d=google.com; s=arc-20160816; b=hYHcunSRDRI6GZmFOB6IpmNRuCIliHv0by2KN21ZgYxh6zkgvqFaHvEmh6eXuXSHp5 iEDMG9ouPAi5THVx2+npqtgD9wW0eqWcNwsjAJeZpf9nTa/rY8UG1vfiB8meCJ5ds1NJ sL99K9QETFi6kJ4d30kJElYCFuVey5rV/5hVNQPSjEPljMdfC2czNyCYS6xaL+NYb0fv jIz3buREY56BohCWmoZYFa49DRgzxHeEsbxrf/Be1aDGjJjvuCLQOzrXhfZNfKoqL13g zEpn7XicL5ZgFtCdTs7X2eu9BYA+SNXgA4mrA6eiJLmkPmeJh78GAJUMUDaVmFbUNuzG dlyg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date :arc-authentication-results; bh=5MKizBSGj4YnDVgRz4bRgjxZGHW5NeMOnc8nmEPO2jE=; b=DQ3pgT0+WLtNzWeIwSzeWlExsi2iHITG8P3ntCD0DMkxJQV+DcAGN9Cqp5e5mCT4/h Sv/R7UCzkIfTA6q11/7BKuab6DJy6v9bH/sz7BSmA0aPOFNnA6V1kQ3t3wNNUdYJzPDD KtLrI86VG4zKFCN0Sc6ezkPFC2hHhaGnML4bJS1msGCMwOvQ7nMG9nvY/yfNu675n5wM rM8KSdi4HtVjxuHAmFu1pECDh87pLAhc56rHZM7V2fbY0jPyQbyU7/knuqqHDpZMWlz8 m0/h28rYXOlyiFn07351pzvE2Hedgi1ykZDp05CFqvP3qwLAxtybXx6j7rzDyogi2x24 k5eA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z80si22703781pfi.7.2018.05.08.05.54.44; Tue, 08 May 2018 05:54:59 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755153AbeEHMyT (ORCPT + 99 others); Tue, 8 May 2018 08:54:19 -0400 Received: from resqmta-ch2-05v.sys.comcast.net ([69.252.207.37]:36710 "EHLO resqmta-ch2-05v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754966AbeEHMyS (ORCPT ); Tue, 8 May 2018 08:54:18 -0400 Received: from resomta-ch2-14v.sys.comcast.net ([69.252.207.110]) by resqmta-ch2-05v.sys.comcast.net with ESMTP id G17xfIlQqLGymG28Hfxu00; Tue, 08 May 2018 12:54:17 +0000 Received: from gentwo.org ([98.222.162.64]) by resomta-ch2-14v.sys.comcast.net with ESMTPA id G28FfggFB1FLWG28Gf9Rqh; Tue, 08 May 2018 12:54:17 +0000 Received: by gentwo.org (Postfix, from userid 1001) id C9EFA1160540; Tue, 8 May 2018 07:54:15 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id C8B78116050C; Tue, 8 May 2018 07:54:15 -0500 (CDT) Date: Tue, 8 May 2018 07:54:15 -0500 (CDT) From: Christopher Lameter X-X-Sender: cl@nuc-kabylake To: "Luis R. Rodriguez" cc: tglx@linutronix.de, arnd@arndb.de, keescook@chromium.org, luto@amacapital.net, longman@redhat.com, viro@zeniv.linux.org.uk, willy@infradead.org, ebiederm@xmission.com, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: expland documentation over __read_mostly In-Reply-To: <20180507231506.4891-1-mcgrof@kernel.org> Message-ID: References: <20180507231506.4891-1-mcgrof@kernel.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-CMAE-Envelope: MS4wfI1KDjm9FVYwIHuATmWVzrrjDoG5QbN0vnT+BUdD2Lr4wXju/eDr8O3k2+iQzPGygOP+Nw27j0R51hfx2qsDZ4JwRqcgMny+PYJyQ5+Ach16QaLlKsqh rxdgilnalQJoOAUVTVVJAVFVkRuh6IQjEbeOn2QmpwIu902WCVVIMt9RC3k+tOGwaWI901plw3q7QN86T01p5viKV+hQedJ3ocURYSiLAB7Hf2y1JAz9L/Cl gFpkD5RlT7BG7buNBlMP/3DLvwFWGg6BJ3RGIicui2HBxUDVKi551hCtjx+GI6PNTmmzHxf3LWiM7FsS+OGMbJ0l5psIpNkzeA9UIN6BMKvm5WQdRzpmMF+1 3WzsRNi21O/hHm0wbh+agGixQ6aVqeloy6EccrIQGkgnBaeEjGx5Cvnc9HpdHBBIO5W5s2JiJEK0L/OVyQmFO59C9g2GBUP01+IVu77KCI3vfqGGJJgs50l3 Xrp7SjtozZDP4O+A8QCMPJynz+yYWOK6Lx0E6Q== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 7 May 2018, Luis R. Rodriguez wrote: > __read_mostly can easily be misused by folks, its not meant for > just read-only data. There are performance reasons for using it, but > we also don't provide any guidance about its use. Provide a bit more > guidance over it use. Acked-by: Christoph Lameter