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Date: Thu, 30 Jul 2009 17:46:17 +0300
From: Andriy Gapon <avg@freebsd.org>
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To: Thomas Backman <serenity@exscape.org>
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Cc: freebsd-fs@freebsd.org, FreeBSD current <freebsd-current@freebsd.org>,
	Pawel Jakub Dawidek <pjd@freebsd.org>
Subject: Re: zfs: Fatal trap 12: page fault while in kernel mode
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on 30/07/2009 17:39 Thomas Backman said the following:
> On Jul 30, 2009, at 16:24, Andriy Gapon wrote:
>>
>> Could you please add DEBUG_VFS_LOCKS to kernel config and check that
>> we haven't
>> broke VFS locking with the patch?
>> Thank you again!
>>
>> -- 
>> Andriy Gapon
> Hey, thank *you* :)
> Currently recompiling the kernel, I'll have a look later. What do I do,
> though? Just keep an eye on the console, or something more involved?
> (Or, since the handbook mentions lockedvnods in ddb: when should I check
> lockedvnods?)

I think you should get a panic if anything goes wrong.
And I think you would get one :-)

Next thing to try after that is the updated patch from Pawel:
http://people.freebsd.org/~pjd/patches/zfs_vnops.c.2.patch


-- 
Andriy Gapon