Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751461Ab2JARhc (ORCPT ); Mon, 1 Oct 2012 13:37:32 -0400 Received: from mga02.intel.com ([134.134.136.20]:28285 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750753Ab2JARha (ORCPT ); Mon, 1 Oct 2012 13:37:30 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,517,1344236400"; d="scan'208";a="200289002" Message-ID: <5069D4D3.1040003@linux.intel.com> Date: Mon, 01 Oct 2012 10:37:23 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0 MIME-Version: 1.0 To: "Kirill A. Shutemov" CC: Andrea Arcangeli , "Kirill A. Shutemov" , Andrew Morton , linux-mm@kvack.org, Andi Kleen , linux-kernel@vger.kernel.org, Arnd Bergmann , Ingo Molnar , linux-arch@vger.kernel.org Subject: Re: [PATCH 0/3] Virtual huge zero page References: <1348875441-19561-1-git-send-email-kirill.shutemov@linux.intel.com> <20120929134811.GC26989@redhat.com> <5069B804.6040902@linux.intel.com> <20121001163118.GC18051@redhat.com> <5069CCF9.7040309@linux.intel.com> <20121001172624.GD18051@redhat.com> <5069D3D8.9070805@linux.intel.com> <20121001173604.GC20915@shutemov.name> In-Reply-To: <20121001173604.GC20915@shutemov.name> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 838 Lines: 23 On 10/01/2012 10:36 AM, Kirill A. Shutemov wrote: > On Mon, Oct 01, 2012 at 10:33:12AM -0700, H. Peter Anvin wrote: >> Overall, I'm okay with either as long as we don't lock down 2 MB when >> there isn't a huge zero page in use. > > Is shinker-reclaimable huge zero page okay for you? > Yes, I'm fine with that. However, I'm curious about the relative benefit versus virtual hzp from a performance perspective, on an application where hzp actually matters. One can otherwise argue that if hzp doesn't matter for except in a small number of cases that we shouldn't use it at all. -hpa -- 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/