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=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 ADA90C4332B for ; Wed, 13 Jan 2021 10:58:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6419B23428 for ; Wed, 13 Jan 2021 10:58:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727052AbhAMK6W (ORCPT ); Wed, 13 Jan 2021 05:58:22 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:60120 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726939AbhAMK6W (ORCPT ); Wed, 13 Jan 2021 05:58:22 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610535416; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=5mnxdraFFc27NKPKaDd5/PxGNaQDZhdz3BpuYoF4+jY=; b=EYzIWxYgCTBnk2L/61+d6p59OId9BJHbcLa2Pc/zg+UZmWVB7n1UAGGRgvsGd+5N8buq1n 9TUA6UxHEOOBoq8DbVQAbvItJavdZLgd0qGxRJ53MV/0yG25rdW+FR2Fn8F0+n0uOc6kng 9a4BMC+OntI/EPju47v6etD/n5CLJoQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-270-52fHE9t9Mq2VGNsItg2Cnw-1; Wed, 13 Jan 2021 05:56:52 -0500 X-MC-Unique: 52fHE9t9Mq2VGNsItg2Cnw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D44E918C8C02; Wed, 13 Jan 2021 10:56:48 +0000 (UTC) Received: from warthog.procyon.org.uk (ovpn-112-8.rdu2.redhat.com [10.10.112.8]) by smtp.corp.redhat.com (Postfix) with ESMTP id 05A086A914; Wed, 13 Jan 2021 10:56:44 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <1610099389-28329-1-git-send-email-pnagar@codeaurora.org> <0f467390-e018-6051-0014-ab475ed76863@schaufler-ca.com> To: Casey Schaufler Cc: dhowells@redhat.com, pnagar@codeaurora.org, arnd@arndb.de, jmorris@namei.org, serge@hallyn.com, paul@paul-moore.com, stephen.smalley.work@gmail.com, eparis@parisplace.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, linux-arch@vger.kernel.org, psodagud@codeaurora.org, nmardana@codeaurora.org, dsule@codeaurora.org, Joe Perches , Miguel Ojeda , Nick Desaulniers , linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v2] selinux: security: Move selinux_state to a separate page MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <2646560.1610535404.1@warthog.procyon.org.uk> Date: Wed, 13 Jan 2021 10:56:44 +0000 Message-ID: <2646561.1610535404@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Precedence: bulk List-ID: Casey Schaufler wrote: > >> How would this interact with or complement __read_mostly? > >> > > Currently, the mechanism we are working on developing is > > independent of __read_mostly. This is something we can look more into > > while working further on the mechanism. > > Please either integrate the two or explain how they differ. > It appears that you haven't considered how you might exploit > or expand the existing mechanism. I think __read_mostly is about grouping stuff together that's rarely going to be read to make the CPU's data cache more efficient. It doesn't stop people writing to such a variable. David