Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751194AbaLRO5o (ORCPT ); Thu, 18 Dec 2014 09:57:44 -0500 Received: from resqmta-ch2-01v.sys.comcast.net ([69.252.207.33]:51127 "EHLO resqmta-ch2-01v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750899AbaLRO5n (ORCPT ); Thu, 18 Dec 2014 09:57:43 -0500 Date: Thu, 18 Dec 2014 08:57:39 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Joonsoo Kim cc: Joonsoo Kim , akpm@linuxfoundation.org, Steven Rostedt , LKML , Thomas Gleixner , Linux Memory Management List , Pekka Enberg , Jesper Dangaard Brouer Subject: Re: [PATCH 0/7] slub: Fastpath optimization (especially for RT) V1 In-Reply-To: Message-ID: References: <20141210163017.092096069@linux.com> <20141215075933.GD4898@js1304-P5Q-DELUXE> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 18 Dec 2014, Joonsoo Kim wrote: > > Good idea. How does this affect the !CONFIG_PREEMPT case? > > One more this_cpu_xxx makes fastpath slow if !CONFIG_PREEMPT. > Roughly 3~5%. > > We can deal with each cases separately although it looks dirty. Ok maybe you can come up with a solution that is as clean as possible? -- 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/