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Date:      Sun, 16 Nov 2014 18:34:42 +0000
From:      Mark R V Murray <markm@FreeBSD.org>
To:        Ian Lepore <ian@FreeBSD.org>
Cc:        Hans Petter Selasky <hps@selasky.org>, Adrian Chadd <adrian@freebsd.org>, freebsd-current <freebsd-current@freebsd.org>, Steve Kargl <sgk@troutmask.apl.washington.edu>, Dag-Erling Sm?rgrav <des@freebsd.org>
Subject:   Re: USB locks up system -- WAS Re: shutdown or acpi problem
Message-ID:  <4F3B4E02-0ADD-46EB-BB90-BF360E810585@FreeBSD.org>
In-Reply-To: <1416162718.4781.192.camel@revolution.hippie.lan>
References:  <20141112224212.GA14013@troutmask.apl.washington.edu> <20141113172533.GA18690@troutmask.apl.washington.edu> <20141113180332.GA18990@troutmask.apl.washington.edu> <20141113181515.GA19117@troutmask.apl.washington.edu> <546515BF.6030508@selasky.org> <20141113212206.GA20802@troutmask.apl.washington.edu> <20141116054141.GA33186@troutmask.apl.washington.edu> <CAJ-Vmo=8oQdi_5um3ck%2BQwb=4KL2QfHE=ykQ2mNTJc5QerOEuw@mail.gmail.com> <20141116175102.GA35649@troutmask.apl.washington.edu> <D5925789-834A-42C8-9854-2E055592DA46@FreeBSD.org> <1416162070.4781.186.camel@revolution.hippie.lan> <F0B9570C-BADD-4843-AE91-66CAB0B5DE85@FreeBSD.org> <1416162718.4781.192.camel@revolution.hippie.lan>

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> On 16 Nov 2014, at 18:31, Ian Lepore <ian@FreeBSD.org> wrote:
>=20
> The point I'm trying to make here is that you trimmed away the =
important
> part of the prior messages and replied only to the part where Steve's
> debugging efforts were somewhat speculating.  The non-speculative part
> was where he bisected the failure to an exact commit:
>=20
>>>> The problem is caused
>>>> by r273872.  This is the recent random device patch.  I have no
>>>> idea why removing a usb device would cause the system to lock
>>>> up other than random is probably trying to harvest some entropy.

I=E2=80=99m sorry my commit caused the problem.

I=E2=80=99m also trying to find out why, but I don=E2=80=99t know enough =
about USB or
mass-storage devices to know why, so this may take me a while. In the
meanwhile, I=E2=80=99ll try to help by pointing out things I do know.

M
--=20
Mark R V Murray




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