Panic since I installed a second CPU

[tnxgalaxy]

Guys,

I have a Lenovo D30 rev 4354, I could get it to work perfectly with Yosemite until I installed the second CPU.
I even wrote a guide to install yosemite on this machine here:
http://www.tonymacx86.com/yosemite-...mite-install-guide-lenovo-d30-rev-4354-a.html

It's a C600 / X79 based motherboard, with VT-d disabled,
It worked perfectly with:
- 128GB RAM
- 1x Xeon E5-2607 v2

and now panics with:
- 256GB RAM
- 2x Xeon E5-2607 v2

The panic message is:

panic(cpu 0 caller 0xffffff80003f5ae5): "pmap_init"@/SourceCache/xnu/xnu-2782.50.1/osmfk/x86_64/pmap.c:693

The options I use are:
kext-dev-mode=1 -v npci=0x2000

Any idea / suggestion?

Thanks!

 

[tnxgalaxy]

I managed to go a bit further by adding the following options:
maxmem=131072 cpus=1

Maybe Mac OS X Yosemite does not support more than 128GB of RAM?

Now I'm getting this commpage panic (please see photo attached).

I think I found that commpage.c file where the panic happens:

http://opensource.apple.com/source/xnu/xnu-1504.7.4/osfmk/i386/commpage/commpage.c

that would be in line 195 which means it happens in commpage_init_cpu_capabilities( void ).

 

[tnxgalaxy]

I tried Mac Pro 5,1 and 6,1 SMBIOS definitions, I tried dart=0, I tried to remove half the dimms, I'm not sure what to try next.

I found the solution, apparently OS X is not able to handle when there are too many cores in the machine, my CPUs are E5-2697 v2s with 12 cores each, by disabling hyperthreading and limiting the core number to 8 for each CPU, it boots!
I also tried to enable the 24 cores, it seems to work but still with hyper threading disabled.

Now I am getting the freeze issue being talked about in this thread/post:
http://www.tonymacx86.com/yosemite-...t7600-yosemite-install-issues.html#post951699