On Tue, 11/20 20:34, Dongli Zhang wrote: > Hi, > > Would you please help explain in which case AioHandler->is_external is true, > and > when it is false? > > I read about iothread and mainloop and I am little bit confused about it.
VirtIO's ioeventfd is an example of is_external == true. It means the events handler on this fd may initiate more I/O, such as read/write on virtual storage backend, so are specially taken care of at certain points when we won't want more I/O requests to be processed, such as when a block job is completing, or in the middle of a QMP transaction. Fam
