Some new hardware with 9.1 does not reboot easily

[Steven Hartland]

----- Original Message ----- 
From: "Willem Jan Withagen" <wjw at digiware.nl>
To: "Julian Stecklina" <jsteckli at os.inf.tu-dresden.de>
Cc: "Steven Hartland" <killing at multiplay.co.uk>; "Andriy Gapon" <avg at FreeBSD.org>; <freebsd-stable at FreeBSD.org>
Sent: Thursday, January 17, 2013 2:11 PM
Subject: Re: Some new hardware with 9.1 does not reboot easily


> On 2013-01-17 3:08, Julian Stecklina wrote:
>> 
>> 
>> Steven Hartland <killing at multiplay.co.uk> wrote:
>> 
>>> ----- Original Message ----- From: "Andriy Gapon"
>>> <avg at FreeBSD.org>
>>> 
>>> 
>>>> on 11/01/2013 21:38 Willem Jan Withagen said the following:
>>>>> On 2013-01-07 18:06, Julian Stecklina wrote:
>>>>>> Has this been resolved? I still see a hang on reboot/shutdown
>>>>>> on my
>>> box
>>>>>> (zfs root on USB thumb drive), but I am not sure if the
>>>>>> problem is related.
>>>>> 
>>>>> Could very well be be.
>>>>> 
>>>>> I have again the same problem as I reported before with the
>>>>> full and
>>> new
>>>>> 9.1 code. But did not have time yet to build a system te test
>>>>> with.
>>>>> 
>>>>> My other 9.1 box is my ZFS only fileserver. And I do not want
>>>>> to
>>> fidle
>>>>> to much with it.
>>> 
>>> Not sure if this has been suggested or ruled out as yet but if you
>>> have usb enabled, you don't need to be using it, try the following
>>> see if it helps?
>>> 
>>> sysctl hw.usb.no_shutdown_wait=1
>> 
>> With that sysctl set the box shuts down just fine. Thanks!
>> 
>>> 
>>> If it does 1. Temporary fix is to pop that in /etc/sysctl.conf 2.
>>> Worth investigating which USB component isn't dropping references 
>>> correctly.
>> 
>> I only have an USB thumb drive and a USB soundcard attached. I tried
>> it without the soundcard attached and would still not reset/shutdown,
>> so that does not seem to be the problem.
>> 
>> I attached usbconfig list output.
> 
> Hi all,
> 
> This is with:
> FreeBSD zfs.digiware.nl 9.1-STABLE FreeBSD 9.1-STABLE #59 r245340:
> Sun Jan 13 06:49:37 CET 2013
> 
> I removed my WD USB disk, and it started to reboot just fine....
> And as such I think it is a combination of USB storage and ZFS.
> 
> So it could very well be a derivative of the previous problems where a
> more complex situation in storage ended up in deadlock.
> 
> Thanx to Steven for putting the finger in the correct hole in the dike....
> For the time being I'll just pop the sysctl into the config.

I don't "think" it will FS related, when I looked it was purely a device reference
count thing.

If you have a blank or unmounted device plugged in does it still fail to reboot
without that sysctl?

    Regards
    Steve

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