Linux Huge Pages and child termination by SIGBUS after fork()

Question

In Linux, access to hugepages is provided through a virtual file system hugetlbfs. The libhugetlbfs library interface works with hugetlbfs to provide more convenient specific application-level services.

libhugetlbfs can be used to make an existing application use hugepages for all its malloc() calls.

To run a program using the automatic hugepage malloc() feature, I have set following environment variables:

1. Set LD_PRELOAD=libhugetlbfs.so
2. Set LD_LIBRARY_PATH to the directory containing libhugetlbfs.so
3. Set HUGETLB_MORECORE=yes

Now, my new process uses huge pages, if available, for all malloc() memory. But when it executes fork() system call and if there are not enough huge pages on the system, the child gets terminated by SIGBUS. This is happening because when child tries to update some memory location in the malloc'd memory, page fault occurs. Due to Copy-On-Write mechanism, system tries to allocate new huge page to child to serve the page fault. But since there is no huge page available, kernel generates the SIGBUS and errors out.

I would appreciate any help/pointer to work around the ugly termination of child by SIGBUS and causing core.