Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751761AbWEILYP (ORCPT ); Tue, 9 May 2006 07:24:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751763AbWEILYO (ORCPT ); Tue, 9 May 2006 07:24:14 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:47291 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S1751761AbWEILYO (ORCPT ); Tue, 9 May 2006 07:24:14 -0400 Date: Tue, 9 May 2006 13:23:34 +0200 From: Pavel Machek To: Matt Mackall Cc: "David S. Miller" , tytso@mit.edu, mrmacman_g4@mac.com, akpm@osdl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 7/14] random: Remove SA_SAMPLE_RANDOM from network drivers Message-ID: <20060509112334.GB8816@elf.ucw.cz> References: <20060506.170810.74552888.davem@davemloft.net> <20060507045920.GH15445@waste.org> <20060508062604.GD5765@ucw.cz> <20060508.000754.06312852.davem@davemloft.net> <20060508140500.GZ15445@waste.org> <20060508172111.GA5266@ucw.cz> <20060508172726.GH15445@waste.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060508172726.GH15445@waste.org> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1168 Lines: 30 On Po 08-05-06 12:27:26, Matt Mackall wrote: > On Mon, May 08, 2006 at 05:21:12PM +0000, Pavel Machek wrote: > > Hi! > > > > > > What do other platforms without a TSC do? > > > > > > Using get_cycles() for /dev/random is new as of 2.6. Before that, we > > > were directly calling rdtsc on x86 alone. 10msec resolution is fine > > > for plenty of sources. > > > > For what devices are timestamps still 'random/unobservable' in 10msec > > range? > > > > Maybe keyboard... but no, keyboard has autorepeat and can be observed > > remotely with 10msec accuracy in many cases. (telnet to bbs?) > > Please go look at the code. Ok, so perhaps it got autorepeat right. Still you claimed "plenty" of usable sources, and keyboard is remotely observable. Please show me "plenty". Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - 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/