Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 2 Nov 2002 07:03:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 2 Nov 2002 07:03:26 -0500 Received: from ns.suse.de ([213.95.15.193]:29452 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id ; Sat, 2 Nov 2002 07:03:25 -0500 Date: Sat, 2 Nov 2002 13:09:54 +0100 From: Andi Kleen To: Denis Vlasenko Cc: Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [PATCH] 2/2 2.5.45 cleanup & add original copy_ro/from_user Message-ID: <20021102130954.A30729@wotan.suse.de> References: <20021102025838.220E.AT541@columbia.edu.suse.lists.linux.kernel> <3DC3A9C0.7979C276@digeo.com.suse.lists.linux.kernel> <200211021203.gA2C37p24480@Port.imtp.ilyichevsk.odessa.ua> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200211021203.gA2C37p24480@Port.imtp.ilyichevsk.odessa.ua> User-Agent: Mutt/1.3.22.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 565 Lines: 14 > That depends on size. If you do huge memcpy (say 1 mb) it still > wins by wide margin. Not that we do such huge operations often, > but code can check size and pick different routines for small > and big blocks The kernel nevers does such huge memcpys. It rarely does handle any buffer bigger than a page (4K) -Andi - 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/