Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754850Ab3HWGxH (ORCPT ); Fri, 23 Aug 2013 02:53:07 -0400 Received: from LGEMRELSE7Q.lge.com ([156.147.1.151]:51227 "EHLO LGEMRELSE7Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754707Ab3HWGxE (ORCPT ); Fri, 23 Aug 2013 02:53:04 -0400 X-AuditID: 9c930197-b7b44ae00000347f-b7-521706cf87e3 Date: Fri, 23 Aug 2013 15:53:15 +0900 From: Joonsoo Kim To: Christoph Lameter Cc: Pekka Enberg , Andrew Morton , David Rientjes , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 05/16] slab: remove cachep in struct slab_rcu Message-ID: <20130823065315.GG22605@lge.com> References: <1377161065-30552-1-git-send-email-iamjoonsoo.kim@lge.com> <1377161065-30552-6-git-send-email-iamjoonsoo.kim@lge.com> <00000140a72870a6-f7c87696-ecbc-432c-9f41-93f414c0c623-000000@email.amazonses.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000140a72870a6-f7c87696-ecbc-432c-9f41-93f414c0c623-000000@email.amazonses.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 706 Lines: 18 On Thu, Aug 22, 2013 at 05:53:00PM +0000, Christoph Lameter wrote: > On Thu, 22 Aug 2013, Joonsoo Kim wrote: > > > We can get cachep using page in struct slab_rcu, so remove it. > > Ok but this means that we need to touch struct page. Additional cacheline > in cache footprint. In following patch, we overload RCU_HEAD to LRU of struct page and also overload struct slab to struct page. So there is no additional cacheline footprint at final stage. Thanks. -- 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/