Linux crashes on boot on SGI UV systems. git bisect tracked it
down to commit cc5a080c5d40c36089bb08a8a16fa3fc7047fe0f. Undoing
that patch fixes the problem.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cc5a080c5d40c36089bb08a8a16fa3fc7047fe0f
From: Matt Fleming
ExitBootServices() can legitimately fail if any of the event handlers
that are signaled by its invocation change the memory map. In that case,
we need to get the memory map and exit boot services again. Only retry
once so that we don't get stuck if ExitBootServices() is returni
