Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751233AbaLPPss (ORCPT ); Tue, 16 Dec 2014 10:48:48 -0500 Received: from resqmta-ch2-07v.sys.comcast.net ([69.252.207.39]:50606 "EHLO resqmta-ch2-07v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750951AbaLPPsp (ORCPT ); Tue, 16 Dec 2014 10:48:45 -0500 Date: Tue, 16 Dec 2014 09:48:43 -0600 (CST) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Jesper Dangaard Brouer cc: Joonsoo Kim , Andrey Ryabinin , akpm@linuxfoundation.org, rostedt@goodmis.org, LKML , Thomas Gleixner , "linux-mm@kvack.org" , Pekka Enberg Subject: Re: [PATCH 3/7] slub: Do not use c->page on free In-Reply-To: <20141216161521.1f72e102@redhat.com> Message-ID: References: <20141210163017.092096069@linux.com> <20141210163033.717707217@linux.com> <20141215080338.GE4898@js1304-P5Q-DELUXE> <20141216024210.GB23270@js1304-P5Q-DELUXE> <20141216082555.GA6088@js1304-P5Q-DELUXE> <20141216161521.1f72e102@redhat.com> 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 Tue, 16 Dec 2014, Jesper Dangaard Brouer wrote: > > Ok but now there is a multiplication in the fast path. > > Could we pre-calculate the value (page->objects * s->size) and e.g store it > in struct kmem_cache, thus saving the imul ? I think I just used the last available field for the page->address. -- 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/