From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f178.google.com (mail-pd0-f178.google.com [209.85.192.178]) by kanga.kvack.org (Postfix) with ESMTP id 0B72C6B0035 for ; Wed, 18 Dec 2013 03:51:54 -0500 (EST) Received: by mail-pd0-f178.google.com with SMTP id y10so7919796pdj.23 for ; Wed, 18 Dec 2013 00:51:54 -0800 (PST) Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com. [66.111.4.28]) by mx.google.com with ESMTPS id 5si13802196pbj.5.2013.12.18.00.51.52 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 18 Dec 2013 00:51:53 -0800 (PST) Message-ID: <52B16224.50006@iki.fi> Date: Wed, 18 Dec 2013 10:51:48 +0200 From: Pekka Enberg MIME-Version: 1.0 Subject: Re: [RFC][PATCH 0/7] re-shrink 'struct page' when SLUB is on. References: <20131213235903.8236C539@viggo.jf.intel.com> <20131216160128.aa1f1eb8039f5eee578cf560@linux-foundation.org> <52AF9EB9.7080606@sr71.net> In-Reply-To: <52AF9EB9.7080606@sr71.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Dave Hansen , Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Pravin B Shelar , Christoph Lameter , "Kirill A. Shutemov" , Andi Kleen , Pekka Enberg On 12/17/2013 02:45 AM, Dave Hansen wrote: > I'll do some testing and see if I can coax out any delta from the > optimization myself. Christoph went to a lot of trouble to put this > together, so I assumed that he had a really good reason, although the > changelogs don't really mention any. IIRC it's commit 8a5ec0b ("Lockless (and preemptless) fastpaths for slub") that documents the performance gains. The page alignment patches came later once we discovered that we broke the world... Pekka -- 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