From owner-freebsd-arch@FreeBSD.ORG Mon Nov 24 07:53:22 2014 Return-Path: Delivered-To: arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A8AA9C23; Mon, 24 Nov 2014 07:53:22 +0000 (UTC) Received: from gromit.grondar.org (grandfather.grondar.org [IPv6:2a01:348:0:15:5d59:5c20:0:2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 6B4FEAF8; Mon, 24 Nov 2014 07:53:22 +0000 (UTC) Received: from [2001:470:9174:1:20:a85c:9bd2:23e4] by gromit.grondar.org with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.84 (FreeBSD)) (envelope-from ) id 1XsoSV-0001Ie-AR; Mon, 24 Nov 2014 07:53:19 +0000 Subject: Re: svn commit: r274739 - head/sys/mips/conf Mime-Version: 1.0 (Mac OS X Mail 8.1 \(1993\)) Content-Type: text/plain; charset=utf-8 From: Mark R V Murray In-Reply-To: <1416806894.1147.362.camel@revolution.hippie.lan> Date: Mon, 24 Nov 2014 07:53:18 +0000 Content-Transfer-Encoding: quoted-printable Message-Id: <18B8A926-59C0-49B4-ADA3-A11688609852@grondar.org> References: <201411200552.sAK5qnXP063073@svn.freebsd.org> <20141120084832.GE24601@funkthat.com> <20141121092245.GI99957@funkthat.com> <1416582989.1147.250.camel@revolution.hippie.lan> <026FEB8A-CA8C-472F-A8E4-DA3D0AC44B34@grondar.org> <1416596266.1147.290.camel@revolution.hippie.lan> <1416598889.1147.297.camel@revolution.hippie.lan> <86egsvueqk.fsf@nine.des.no> <1416691274.1147.339.camel@revolution.hippie.lan> <398A380D-49AF-480C-8842-8835F81EF641@grondar.org> <1416806894.1147.362.camel@revolution.hippie.lan> To: Ian Lepore X-Mailer: Apple Mail (2.1993) X-SA-Score: -1.0 Cc: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= , arch@freebsd.org X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Nov 2014 07:53:22 -0000 > On 24 Nov 2014, at 05:28, Ian Lepore wrote: >=20 > But I got some logging that maybe will be useful to you, attached. = This > is the boot logging from hitting the reset button 4 times in a row. I > had RANDOM_DEBUG and FORTUNA options on. Thanks. > In the random debugging printf for device attach I added a display of > the actual bits being fed in as well as the count. That data in = tabular > form (from 3 of the 4 runs so it fits email width) is interesting: >=20 > nexus0: 0x00000010c6f7a0b6 0x00000010c6f7a0b6 0x00000010c6f7a0b6 > at91_aic0: 0x00000010c6f7a0b6 0x00000010c6f7a0b6 0x00000010c6f7a0b6 > at91_pmc0: 0x00000010c6f7a0b6 0x00000010c6f7a0b6 0x00000010c6f7a0b6 > at91_st0: 0x0000003254e6e222 0x0000003254e6e222 0x0000003254e6e222 > mmc0: 0x0000000000000000 0x0000000000000000 0x0000020000000000 > at91_mci0: 0x0004480000000000 0x0004480000000000 0x00044e0000000000 > ukphy0: 0x0001980000000000 0x00019a0000000000 0x0001960000000000 > miibus0: 0x00060a0000000000 0x00060c0000000000 0x00060a0000000000 > ate0: 0x000d260000000000 0x000d280000000000 0x000d2a0000000000 > uart0: 0x0001400000000000 0x0001400000000000 0x0001400000000000 > atmelarm0: 0x00231cc9539b8887 0x00231ec9539b8887 0x002328c9539b8887 > mmcsd0: 0x0002620000000000 0x0002620000000000 0x0002620000000000 Those numbers look weird; please send a diff of your change. The number of devices probed is also low. When you get the booting problem sorted, there are some constants that we could change that may help. > This nicely illustrates one of the main points I've been trying to = make > for a long time: This kind of system boots nearly identically every > time you power on or reset. On every boot, all that "entropy" that's > getting fed in is about the same as last time it booted. In addition = to > the low quantity of data available, when you consider its similarity > from one reboot to the next it's hard to even grace it with the name > "entropy.=E2=80=9D I=E2=80=99m well aware of that; I=E2=80=99ve been saying something = similar since at least 2000. M --=20 Mark R V Murray