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Date:      Mon, 24 Nov 2014 07:53:18 +0000
From:      Mark R V Murray <mark@grondar.org>
To:        Ian Lepore <ian@FreeBSD.org>
Cc:        =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>, arch@freebsd.org
Subject:   Re: svn commit: r274739 - head/sys/mips/conf
Message-ID:  <18B8A926-59C0-49B4-ADA3-A11688609852@grondar.org>
In-Reply-To: <1416806894.1147.362.camel@revolution.hippie.lan>
References:  <201411200552.sAK5qnXP063073@svn.freebsd.org> <20141120084832.GE24601@funkthat.com> <AE8F2D30-7F91-4C90-B79A-D99857D8AED8@grondar.org> <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> <F017033A-B761-4435-A7F8-264D2F4662A0@grondar.org> <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>

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> On 24 Nov 2014, at 05:28, Ian Lepore <ian@FreeBSD.org> 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




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