From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e34.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id m55NFMAT032242 for ; Thu, 5 Jun 2008 19:15:22 -0400 Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m55NFLJ6098898 for ; Thu, 5 Jun 2008 17:15:21 -0600 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m55NFK0r022033 for ; Thu, 5 Jun 2008 17:15:21 -0600 Date: Thu, 5 Jun 2008 17:15:19 -0600 From: Nishanth Aravamudan Subject: Re: [patch 14/21] x86: add hugepagesz option on 64-bit Message-ID: <20080605231519.GD31534@us.ibm.com> References: <20080603095956.781009952@amd.local0.net> <20080603100939.967775671@amd.local0.net> <1212515282.8505.19.camel@nimitz.home.sr71.net> <20080603182413.GJ20824@one.firstfloor.org> <1212519555.8505.33.camel@nimitz.home.sr71.net> <20080603205752.GK20824@one.firstfloor.org> <1212528479.7567.28.camel@nimitz.home.sr71.net> <4845DC72.5080206@firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4845DC72.5080206@firstfloor.org> Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Dave Hansen , npiggin@suse.de, akpm@linux-foundation.org, linux-mm@kvack.org, kniht@us.ibm.com, abh@cray.com, joachim.deguara@amd.com List-ID: On 04.06.2008 [02:06:10 +0200], Andi Kleen wrote: > > > Also, as I said, users doesn't really know what the OS or hardware will > > support > > The normal Linux expectation is that these kinds of users will not > use huge pages at all. Or rather if everybody was supposed to use > them then all the interfaces would need to be greatly improved and any > kinds of boot parameters would be out and they would need to be > 100% integrated with the standard VM. > > Hugepages are strictly an harder-to-use optimization for specific people > who love to tweak (e.g. database administrators or benchmarkers). From > what I heard so far these people like to have more control, not less. I really don't want to get involved in this discussion, but let me just say: "Hugepages are *right now* strictly a harder-to-use optimization". libhugetlbfs helps quite a bit (in my opinion) as far as making hugepages easier to use. And Adam's dynamic pool work does as well. It's progress, slow and steady as it may be. I don't really appreciate the entire hugepage area being pigeon-holed into what you've experienced. Thanks, Nish -- 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