(In reply to Sibiao Luo from comment #1)
> Met it in rhel7 host but different qemu core dumped.
> BTW, this issue also a different from bug 895436.
>
> QEMU core dump log:
> (qemu) [Thread 0x7fffeb300700 (LWP 8855) exited]
> [New Thread 0x7fffeb300700 (LWP 9614)]
> [Thread 0x7fffeb300700 (LWP 9614) exited]
> qemu-kvm: /builddir/build/BUILD/qemu-1.5.3/exec.c:762: register_subpage:
> Assertion `existing->mr->subpage || existing->mr == &io_mem_unassigned'
> failed.
>
From this core dumped point "register_subpage: Assertion `existing->mr->subpage || existing->mr == &io_mem_unassigned' failed.", this issue is the same to bug 895436 just with the different scenarios. In QE point, we can leave this bug here for testing only when it fixed, and marked '[TestOnly]' to the title.
Best Regards,
sluo