Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756121Ab3I3QFh (ORCPT ); Mon, 30 Sep 2013 12:05:37 -0400 Received: from mga14.intel.com ([143.182.124.37]:2926 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755580Ab3I3QFg (ORCPT ); Mon, 30 Sep 2013 12:05:36 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,1008,1371106800"; d="scan'208";a="403218741" Date: Mon, 30 Sep 2013 09:05:34 -0700 From: Andi Kleen To: Mel Gorman Cc: Andrew Morton , "Kirill A. Shutemov" , Andrea Arcangeli , Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , linux-mm@kvack.org, Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , Dave Hansen , Ning Qu , Alexander Shishkin , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv6 00/22] Transparent huge page cache: phase 1, everything but mmap() Message-ID: <20130930160534.GB2125@tassilo.jf.intel.com> References: <1379937950-8411-1-git-send-email-kirill.shutemov@linux.intel.com> <20130924163740.4bc7db61e3e520798220dc4c@linux-foundation.org> <20130924234950.GC2018@tassilo.jf.intel.com> <20130930101300.GD2425@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130930101300.GD2425@suse.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1073 Lines: 29 On Mon, Sep 30, 2013 at 11:13:00AM +0100, Mel Gorman wrote: > On Tue, Sep 24, 2013 at 04:49:50PM -0700, Andi Kleen wrote: > > > Sigh. A pox on whoever thought up huge pages. > > > > managing 1TB+ of memory in 4K chunks is just insane. > > The question of larger pages is not "if", but only "when". > > > > Remember that there are at least two separate issues there. One is the > handling data in larger granularities than a 4K page and the second is > the TLB, pagetable etc handling. They are not necessarily the same problem. It's the same problem in the end. The hardware is struggling with 4K pages too (both i and d) I expect longer term TLB/page optimization to have far more important than all this NUMA placement work that people spend so much time on. -Andi -- ak@linux.intel.com -- Speaking for myself only -- 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/