Hhvm prod mode

hi guys

so I use hhvm on my site, performance is great.

however, i am wondering about this production mode thing, and i’m trying to enable it but i get seg faults when i do

hvm-repo-mode enable /var/www

however, when i do it for certain sites inside www those sites work, eg.

hvm-repo-mode enable /var/www/abc.com

can i set this up so that CERTAIN sites run off the binary created and some work off the JIT compiler?

any ideas folks?