From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261409AbTEEVuX (ORCPT ); Mon, 5 May 2003 17:50:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261411AbTEEVuX (ORCPT ); Mon, 5 May 2003 17:50:23 -0400 Received: from sleet.ispgateway.de ([62.67.200.125]:64471 "HELO sleet.ispgateway.de") by vger.kernel.org with SMTP id S261409AbTEEVuW (ORCPT ); Mon, 5 May 2003 17:50:22 -0400 Message-ID: <3EB6DF9F.7050907@gmx.net> Date: Tue, 06 May 2003 00:03:11 +0200 From: Thomas Heinz Reply-To: Thomas Heinz User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.2) Gecko/20010726 Netscape6/6.1 X-Accept-Language: de, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: kmalloc alignment Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Does the following property hold for kmalloc (2.4.x)? Allocating a memory block of size: PAGE_SIZE >= 2^i >= 32 (or 64) returns an address which is at least 2^i bytes aligned. I flew over the code and as far as I can see the slabs are allocated via __get_free_pages which returns PAGE_SIZE bytes aligned memory. Since each slab allocates only blocks of the same size the property follows immeadiately. True or not? Thanks for your help. BTW, please cc your reply to my private e-mail since I'm currently not subscribed. Regards, Thomas