Lock order reversal errors during boot
Bjoern A. Zeeb
bzeeb-lists at lists.zabbadoz.net
Mon May 16 07:44:57 UTC 2016
> On 15 May 2016, at 07:44 , Kurt Jaeger <lists at opsec.eu> wrote:
>> 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) @
>> 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
>> 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:
> 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.
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