Reproducible crash with tmpfs on 9.1-release

[Konstantin Belousov]

On Thu, Jan 17, 2013 at 12:47:21AM +0100, Olivier Cochard-Labb? wrote:
> Hi,
> I reach to reproduce a crash on 9.1-release (amd64) by compiling
> software on a tmpfs workdir (cf PR/175353).
> My first machine is a 8 core with 56GB RAM, but without swap, then I
> didn't have a core dump on it.
> Then I reproduced the crash on a smaller machine with 4 core and only
> 4GB RAM but with a swap.
> I've put the files from my /var/crash online for anyone interested by
> (with the exception of the full vmcore):
> http://gugus69.free.fr/freebsd/tmpfs/core0/

This looks as unionfs problem, and not tmpfs. Unionfs is known to be
broken in varying ways.
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