From owner-freebsd-stable@FreeBSD.ORG  Wed Nov 21 18:15:19 2012
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Date: Wed, 21 Nov 2012 19:15:13 +0100
From: Willem Jan Withagen <wjw@digiware.nl>
Organization: Digiware Management b.v.
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To: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: Some new hardware with 9.1 does not reboot easily
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On 2012-11-21 19:11, Andriy Gapon wrote:
> on 21/11/2012 20:08 Willem Jan Withagen said the following:
>> On 2012-11-21 19:05, Andriy Gapon wrote:
>>> on 21/11/2012 19:48 Willem Jan Withagen said the following:
> [snip]
>>>> It seems to to be waiting/working in the ZFS code to get things unmounted.
>>>
>>> Yeah, oops, this is a known ZFS deadlock in zfs_freebsd_reclaim -> zfs_zget path.
>>> I may commit my fix for it to head on the next weekend.
>>> You may share this information with the list.
>>
>> Any change of getting this back into 9.1?
>> Preferably before 9.1-RELEASE, but otherwise real soon after that.
>>
>> I'm the perfect test guinea-pig, it happens every time I reboot.
> 
> I will definitely MFC it to stable/9, just not sure if I would be able to do it
> before New Year.  It definitely won't be in 9.1.  I'll send you a patch later.

Right,

As long as I can deliver it to the customer with this patch, it be great.

It is due to using more than 1 zfs pool?

--WjW