Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp1516472imm; Fri, 7 Sep 2018 01:23:33 -0700 (PDT) X-Google-Smtp-Source: ANB0VdazMqpeFiWAcjEhaaL56OfrhJYg7XmNDq91NpAkyZWpkNaB90YNv9Lzqh8auEHlnZ34QCyh X-Received: by 2002:a62:6948:: with SMTP id e69-v6mr7271740pfc.166.1536308612991; Fri, 07 Sep 2018 01:23:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1536308612; cv=none; d=google.com; s=arc-20160816; b=LhpJt6wUhIokQyW2z/XbgCIjpEsvJAyjJLuiY8Yr5wBWo2OpTMON2E3J/GEAybsw3I Zt4FYSFVL/EdHr3Ec4jgN+xRDYRH36SijcPfQJiQ7T6LgOLcN9E4U1uPnNAEkFym4C8B bv5T85BtcY6M/OfOaci6rmwonD0U93PgF+l4ASFMW7nmm4plNxHR16Noo5vYHWi5jT7Y fgeQVwIDsR7YmrjZA1eT/DCBSZXpY01/dlGihQ7dJpRjHNIw5TbFm5PpkimD6kSBrXLm gKUYtc9/t2rVxjXuYMqzv3H1usvimHQGSJNHG/sk2YxPRC4s6F1fmLTYS80g9mkjaJLq xxcQ== 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; bh=IXHO6XgJ5ajv2IgK+/OVQtpqK5q2gC9Y3EEH5ZXKAJM=; b=VxSHvpPcHBr7U8WRHpxDW4eI5yFQfFvWwBEU9ftDpgI3yVJpOZrQ4mv7xv8oaW1B0P OfuI11Ii43WW+xtOdisqV/+gEuFJea7rCBnUnbJQG438u1V+iB5XW2MZQ5PcnCgfb+So BgjqskMF4rmPaRuXvp8ruCRwNtoB7oVzY4dZWpdb7dbmIca0/wu+NIATUbcOyf6IWFI4 CBX0DC92WTbOU7MvlLhmU5GHKejUEhHt/nCvSv/X4Y3BHyQ2XK38A/8ACcSIJekH4Dtz 971z1eAs36FYwtENcm+D0dL/r3ooS4dPdCv51cjy+PVqJi/T4w9hAZsmSTz5OybJrZ3Y U5sQ== 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 c10-v6si7240409plr.155.2018.09.07.01.23.17; Fri, 07 Sep 2018 01:23:32 -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 S1727817AbeIGM3p (ORCPT + 99 others); Fri, 7 Sep 2018 08:29:45 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:35609 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726334AbeIGM3p (ORCPT ); Fri, 7 Sep 2018 08:29:45 -0400 Received: from p4fea45ac.dip0.t-ipconnect.de ([79.234.69.172] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1fyBWi-0000Hb-E6; Fri, 07 Sep 2018 09:50:00 +0200 Date: Fri, 7 Sep 2018 09:49:59 +0200 (CEST) From: Thomas Gleixner To: "Yang, Bin" cc: "mingo@kernel.org" , "hpa@zytor.com" , "linux-kernel@vger.kernel.org" , "peterz@infradead.org" , "Gross, Mark" , "x86@kernel.org" , "Hansen, Dave" Subject: Re: [PATCH v3 4/5] x86/mm: optimize static_protection() by using overlap() In-Reply-To: <82fc8d80749f920c4a5107469924205d92037785.camel@intel.com> Message-ID: References: <1534814186-37067-1-git-send-email-bin.yang@intel.com> <1534814186-37067-5-git-send-email-bin.yang@intel.com> <82fc8d80749f920c4a5107469924205d92037785.camel@intel.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 7 Sep 2018, Yang, Bin wrote: > On Tue, 2018-09-04 at 14:22 +0200, Thomas Gleixner wrote: > > I just write a test.c to compare the result between overlap() and > original within(). You are right. Your version of doing the overlap exclusive works. I misread the conditions. I still prefer doing inclusive checks because they are way more obvious. Thanks, tglx