System hanging during dump

[heliocentric at gmail.com]

On 10/15/08, Alfred Perlstein <alfred at freebsd.org> wrote:
> * heliocentric at gmail.com <heliocentric at gmail.com> [081015 12:00] wrote:
>>
>> Perhaps a 'show locks' with an 8-CURRENT kernel with WITNESS enabled
>> will shed light on the problem? As most of the filesystem locking
>> doesn't use lockmgr in 7-STABLE, it would be silent with that kernel.
>
> I might be wrong here, but I think it's actually that lockmgr
> in 7.x isn't watched by witness (but it is in 8.x) is why you
> can only see this warnings in 8.x.
>
> (In other words, filesystems use lockmgr in just about every version
> of FreeBSD back to 2.x or before.)

Yes, you're right. I misread the email about the change.