Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756932Ab3ILUrE (ORCPT ); Thu, 12 Sep 2013 16:47:04 -0400 Received: from terminus.zytor.com ([198.137.202.10]:39933 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756468Ab3ILUrA (ORCPT ); Thu, 12 Sep 2013 16:47:00 -0400 Message-ID: <52322835.8040803@zytor.com> Date: Thu, 12 Sep 2013 13:46:45 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: "Theodore Ts'o" , John Stultz , Stephan Mueller , LKML , dave.taht@bufferbloat.net, Frederic Weisbecker , Thomas Gleixner Subject: Re: [PATCH] /dev/random: Insufficient of entropy on many architectures References: <10005394.BRCyBMYWy3@tauon> <20130910203853.GG29237@thunk.org> <522F851D.1040101@linaro.org> <20130910211009.GI29237@thunk.org> <522F984C.2070909@linaro.org> <20130910223326.GD11063@thunk.org> <522FB9F1.3070905@linaro.org> <20130911005047.GA13315@thunk.org> In-Reply-To: <20130911005047.GA13315@thunk.org> X-Enigmail-Version: 1.5.2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 627 Lines: 19 On 09/10/2013 05:50 PM, Theodore Ts'o wrote: > > Right now, if get_cycles() returns 0, we fall back to only mixing in > the IP register from the interrupt plus the jiffies counter. The > platforms where get_cycles returns 0 is: > > - User mode Linux UML (on x86) should be able to use RDTSC just fine; it might be meaningless for anything *other* than random though... -hpa -- 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/