From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qa0-f54.google.com (mail-qa0-f54.google.com [209.85.216.54]) by kanga.kvack.org (Postfix) with ESMTP id 369736B0072 for ; Thu, 18 Dec 2014 09:57:44 -0500 (EST) Received: by mail-qa0-f54.google.com with SMTP id k15so903201qaq.27 for ; Thu, 18 Dec 2014 06:57:44 -0800 (PST) Received: from resqmta-ch2-10v.sys.comcast.net (resqmta-ch2-10v.sys.comcast.net. [2001:558:fe21:29:69:252:207:42]) by mx.google.com with ESMTPS id s104si8410046qge.78.2014.12.18.06.57.42 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Thu, 18 Dec 2014 06:57:43 -0800 (PST) Date: Thu, 18 Dec 2014 08:57:39 -0600 (CST) From: Christoph Lameter 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: owner-linux-mm@kvack.org List-ID: To: Joonsoo Kim Cc: Joonsoo Kim , akpm@linuxfoundation.org, Steven Rostedt , LKML , Thomas Gleixner , Linux Memory Management List , Pekka Enberg , Jesper Dangaard Brouer 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, 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