recent 8.2-STABLE commits break nullfs for tinderbox?

[Paul B Mahol]

On 12/22/10, Jeremy Chadwick <freebsd at jdc.parodius.com> wrote:
> On Wed, Dec 22, 2010 at 02:21:20PM +0100, Matthias Andree wrote:
>> Am 22.12.2010 13:44, schrieb Mike Tancsa:
>> > On 12/22/2010 7:03 AM, Matthias Andree wrote:
>> >> Greetings,
>> >>
>> >> I'm tracking 8.2-PRERELEASE, and it appears that recent commits to
>> >> nullfs, zfs,
>> >> vfs, or thereabouts have broken Tinderbox for me.
>> >>
>> >> I'm mounting my ports tree via nullfs, which has been working fine for
>> >> a year.
>> >>
>> >> Any ideas, or further info needed?
>> >
>> > Hi,
>> > 	Whats specifically broken ?  Two of the freebsd tinderbox machines are
>> > RELENG_8 from Dec 3 and they are fine.  However, they dont use nullfs,
>> > just zfs and ufs.  Is it just nullfs thats broken ? What are the errors
>> > you are getting ?
>>
>> I updated after that.
>>
>> mount_nullfs /usr/ports.cvs /usr/local/tinderbox/portstrees/FreeBSD/ports
>> fails
>> with "resource conflict avoided".  I'll now rebuild GENERIC from scratch
>> (including "make clean") to see if that helps.
>>
>> Tried switching to NFS, this appears to work now.
>
> FWIW, i can't find this error message ("resource conflict avoided")
> anywhere in /usr/src, /usr/include, nor /usr/ports on RELENG_8 source
> dated from 2 hours ago.
>
> grep -ri "resource conflict" /usr/src does return some results, but
> nothing that looks identical to the string you posted.
>
> Only reason I'm pointing this out: it would be good to find the commit
> that breaks things for you, if there is such a commit, but we need
> something to key off of.

Perhaps OP means "resource deadlock avoided"?

Such message appears if you try to mount same mount point with nullfs
twice - which doesnt have sense.