Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755273AbaF3KXY (ORCPT ); Mon, 30 Jun 2014 06:23:24 -0400 Received: from mta-out1.inet.fi ([62.71.2.199]:41460 "EHLO jenni1.inet.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752372AbaF3KXX (ORCPT ); Mon, 30 Jun 2014 06:23:23 -0400 Date: Mon, 30 Jun 2014 13:23:06 +0300 From: "Kirill A. Shutemov" To: Naoya Horiguchi Cc: linux-mm@kvack.org, Andrew Morton , Dave Hansen , Hugh Dickins , linux-kernel@vger.kernel.org, Naoya Horiguchi Subject: Re: [PATCH v3 01/13] mm/pagewalk: remove pgd_entry() and pud_entry() Message-ID: <20140630102306.GA19833@node.dhcp.inet.fi> References: <1403295099-6407-1-git-send-email-n-horiguchi@ah.jp.nec.com> <1403295099-6407-2-git-send-email-n-horiguchi@ah.jp.nec.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1403295099-6407-2-git-send-email-n-horiguchi@ah.jp.nec.com> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 20, 2014 at 04:11:27PM -0400, Naoya Horiguchi wrote: > Currently no user of page table walker sets ->pgd_entry() or ->pud_entry(), > so checking their existence in each loop is just wasting CPU cycle. > So let's remove it to reduce overhead. > > Signed-off-by: Naoya Horiguchi Acked-by: Kirill A. Shutemov -- Kirill A. Shutemov -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/