On 02/08/19 02:46, Wanpeng Li wrote: > Thanks for reporting this, after more grep, it seems that just x86 and > s390 enable async_pf in their Makefile. So I can move 'if > (!list_empty_careful(&vcpu->async_pf.done))' checking to > kvm_arch_dy_runnable() No, wrap it with #ifdef CONFIG_KVM_ASYNC_PF instead. Thanks! Paolo