kern/187238: vm.pmap.pcid_enabled="1" causes Java to coredump in FBSD 10

[Peter Holm]

On Tue, Mar 25, 2014 at 12:35:01PM +0100, Henrik Gulbrandsen wrote:
> On 2014-03-24 20:11, Konstantin Belousov wrote:
> > Yes, I think that the analysis and the patch (for stable/10) is 
> > correct.
> > Thank you for tracking this down.
> 
> I'm glad to hear that. I was a bit worried when I encountered a very
> similar crash in another Java port yesterday, but that was independent
> of the vm.pmap.pcid_enabled tunable and turned out to be a simple
> ABI version mismatch.
> 
> > Show me the first lines of the verbose dmesg for your machine.
> 
> I'm sorry - was this a request for me or Craig? I'm not quite sure
> what information you're looking for.
> 
> > Below is the cumulative patch for HEAD.  If somebody can test this
> > with jdk build on HEAD, it would be useful.
> > For testing, the tunable vm.pmap.pcid_enabled must be set to 1
> > from the loader prompt.
> 
> I'd be happy to test, but at the moment I'm stuck doing some real work
> on my only suitable machine, so it will have to wait. If anyone else
> wants to do it - feel free to contribute! :-)
> 
> /Henrik

I'm testing this right now. Uptime is 3 hours so far.
-- 
Peter