Lock order reversal errors during boot

[Will Brokenbourgh]

On 05/16/16 00:44, Bjoern A. Zeeb wrote:
>> On 15 May 2016, at 07:44 , Kurt Jaeger <lists at opsec.eu> wrote:
>>
>> Hi!
>>
>>> I am seeing 'lock order reversal' errors during boot on 11-CURRENT -
>>> r298793.  A sample error:
>>>
>>> lock order reversal:
>>>   1st 0xfffff8011280d068 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2498
>>>   2nd 0xfffffe01ca539400 bufwait (bufwait) @
>>> /usr/src/sys/ufs/ffs/ffs_vnops.c:263
>>>   3rd 0xfffff80112a23b78 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2498
>>> stack backtrace:
>>> #0 0xffffffff80a94bf0 at witness_debugger+0x70
>>> #1 0xffffffff80a94ae4 at witness_checkorder+0xe54
>>> #2 0xffffffff80a0fdd6 at __lockmgr_args+0x4d6
>>> #3 0xffffffff80ce9626 at ffs_lock+0xa6
>>> [...snip...]
>>>
>>> I'm not sure if this is even something I should report, but better safe
>>> than sorry, yes?
>> Yes, and there's even a page to compare your LOR against other ones:
>>
>> http://sources.zabbadoz.net/freebsd/lor.html
>>
>> Can you try if you find your LOR there ? If not, can you add it
>> to that page ?
> No he can’t and I haven’t in years either.   Searching bugs might however be a good idea;  there is a LOR category or tag somewhere.
>
> /bz
Thank you for the replies.

I'm getting these LORs pretty frequently.  Is this a normal occurrence 
for 11-CURRENT or is it only me having this problem?

Thanks

Will Brokenbourgh