Following instructions to set up Wordpress (from http://www.hiphop-php.com/wp/?p=113):
# /usr/bin/hhvm --mode server --user www-data --config /etc/hhvm.hdf
/home/sgolemon/dev/hiphop-php/src/runtime/vm/translator/asm-x64.cpp:79 (makeExecable): mprotect @(nil) 32768 bytes failed (Cannot allocate memory)
/home/sgolemon/dev/hiphop-php/src/runtime/vm/translator/asm-x64.cpp:79 (makeExecable): mprotect @(nil) 32768 bytes failed (Cannot allocate memory)
Aborted (core dumped)