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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 629ACC433E0 for ; Wed, 17 Jun 2020 15:51:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 19F2F20773 for ; Wed, 17 Jun 2020 15:51:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 19F2F20773 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 34CEF6B0002; Wed, 17 Jun 2020 11:51:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2FA1E6B0005; Wed, 17 Jun 2020 11:51:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 210696B0008; Wed, 17 Jun 2020 11:51:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0117.hostedemail.com [216.40.44.117]) by kanga.kvack.org (Postfix) with ESMTP id 099016B0002 for ; Wed, 17 Jun 2020 11:51:18 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id BA15E1811CE4D for ; Wed, 17 Jun 2020 15:51:17 +0000 (UTC) X-FDA: 76939142994.11.ship54_61033ea26e08 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin11.hostedemail.com (Postfix) with ESMTP id 4C4D31811CE45 for ; Wed, 17 Jun 2020 15:51:17 +0000 (UTC) X-HE-Tag: ship54_61033ea26e08 X-Filterd-Recvd-Size: 1513 Received: from gentwo.org (gentwo.org [3.19.106.255]) by imf01.hostedemail.com (Postfix) with ESMTP for ; Wed, 17 Jun 2020 15:51:16 +0000 (UTC) Received: by gentwo.org (Postfix, from userid 1002) id 5FD853E9DB; Wed, 17 Jun 2020 15:51:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by gentwo.org (Postfix) with ESMTP id 5D6783E9D1; Wed, 17 Jun 2020 15:51:11 +0000 (UTC) Date: Wed, 17 Jun 2020 15:51:11 +0000 (UTC) From: Christopher Lameter X-X-Sender: cl@www.lameter.com To: Andrew Morton cc: aquini@redhat.com, arnd@arndb.de, keescook@chromium.org, linux-mm@kvack.org, mcgrof@kernel.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, willy@infradead.org Subject: Re: [patch 93/93] include/linux/cache.h: expand documentation over __read_mostly In-Reply-To: <20200609043507.T5yqheABR%akpm@linux-foundation.org> Message-ID: References: <20200609043507.T5yqheABR%akpm@linux-foundation.org> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: 4C4D31811CE45 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 8 Jun 2020, Andrew Morton 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 its use. Acked-by: Christoph Lameter