> On 15 May 2016, at 07:44 , Kurt Jaeger <li...@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


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