From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f175.google.com (mail-pd0-f175.google.com [209.85.192.175]) by kanga.kvack.org (Postfix) with ESMTP id 3DC9B6B0071 for ; Wed, 5 Nov 2014 17:58:54 -0500 (EST) Received: by mail-pd0-f175.google.com with SMTP id y13so1647609pdi.20 for ; Wed, 05 Nov 2014 14:58:53 -0800 (PST) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTP id ku8si4090872pbc.247.2014.11.05.14.58.51 for ; Wed, 05 Nov 2014 14:58:52 -0800 (PST) From: Andi Kleen Subject: Re: [PATCH] Documentation: vm: Add 1GB large page support information References: <1414771317-5721-1-git-send-email-standby24x7@gmail.com> <5457C6EA.3080809@intel.com> <545A42C4.6070908@intel.com> Date: Wed, 05 Nov 2014 14:58:51 -0800 In-Reply-To: <545A42C4.6070908@intel.com> (Dave Hansen's message of "Wed, 05 Nov 2014 07:31:16 -0800") Message-ID: <871tphtftg.fsf@tassilo.jf.intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Dave Hansen Cc: Masanari Iida , Jonathan Corbet , "linux-kernel@vger.kernel.org" , linux-mm@kvack.org, lcapitulino@redhat.com Dave Hansen writes: > On 11/05/2014 07:21 AM, Masanari Iida wrote: >> Luiz, Dave, >> Thanks for comments. >> >> I understand that there are some exception cases which doesn't support 1G >> large pages on newer CPUs. >> I like Dave's example, at the same time I would like to add "pdpe1gb flag" in >> the document. >> >> For example, x86 CPUs normally support 4K and 2M (1G if pdpe1gb flag exist). > > Is 1G supported on CPUs that have pdpe1gb and are running a 32-bit kernel? No, 1GB pages is a 64bit only feature. -Andi -- ak@linux.intel.com -- Speaking for myself only -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org