Update - The actual forkSqueak is working fine, but we get failures associated with aio handling for the socket connection to the X11 server. The child closes the socket and calls aioDisable for the socket fd to unregister it. When using epoll rather than generic aio event handling, this apparently affects the Linux kernel epoll registration for the socket fd (I am not sure if I understand this correctly, but this appears to be the case). The result seems to be failures in either the child or parent VM process, or both. The problem goes away if I #ifdef the call to aioDisable() in the forgetXDisplay() function. I am not sure if this is a proper fix or just a workaround kludge, but it does work.

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