Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932377AbVJLMHR (ORCPT ); Wed, 12 Oct 2005 08:07:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932430AbVJLMHQ (ORCPT ); Wed, 12 Oct 2005 08:07:16 -0400 Received: from [195.23.16.24] ([195.23.16.24]:13238 "EHLO linuxbipbip.grupopie.com") by vger.kernel.org with ESMTP id S932377AbVJLMHP (ORCPT ); Wed, 12 Oct 2005 08:07:15 -0400 Message-ID: <434CFC6B.6090605@grupopie.com> Date: Wed, 12 Oct 2005 13:07:07 +0100 From: Paulo Marques Organization: Grupo PIE User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050716) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Roberto Jung Drebes CC: linux-kernel@vger.kernel.org Subject: Re: Instantiating my own random number generator References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1161 Lines: 37 Roberto Jung Drebes wrote: > > Hi there, Hi, > I have a kernel module which asks for random numbers using > get_random_bytes(). > > Is there a way I can set this number generator my own seed value, so > that I can replay experiments I perform with my module? If I set a seed > for the whole system, it would affect other kernel tasks obtaining > random numbers through get_random_bytes(), so I guess that is not a > good solution. Why don't you implement a simple PRNG in your own module that you can control yourself for your experiments, and then replace it later with get_random_bytes()? There are a number of PRNG's that are simple to implement and good enough for most problems: http://en.wikipedia.org/wiki/List_of_pseudorandom_number_generators I hope this helps, -- Paulo Marques - www.grupopie.com The rule is perfect: in all matters of opinion our adversaries are insane. Mark Twain - 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/