From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f45.google.com (mail-pb0-f45.google.com [209.85.160.45]) by kanga.kvack.org (Postfix) with ESMTP id C1FBD6B0038 for ; Mon, 30 Sep 2013 12:05:38 -0400 (EDT) Received: by mail-pb0-f45.google.com with SMTP id mc17so5777080pbc.18 for ; Mon, 30 Sep 2013 09:05:38 -0700 (PDT) Date: Mon, 30 Sep 2013 09:05:34 -0700 From: Andi Kleen 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> Sender: owner-linux-mm@kvack.org List-ID: 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 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, 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