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...>, chapter 5 Event Channels, they say that:"Event Notifications can be masked by setting a flag; this is equivalent to disabling interrupts and can be used to ensure atomicity of certain operation in the guest kernel". My question is : I know that we can use ''xc_evtchn_unmask(xcehandle, port)'' to unmask an event channel , but I can not find the function used to mask an event channel. Can any body solve the problem? Thanks a lot. Danius Wu =============================================== _...