Re: [Qemu-devel] Block I/O outside the QEMU global mutex was "Re: [RFC PATCH 00/17] Support for multiple "AIO contexts""

[Paolo Bonzini]

Il 09/10/2012 13:55, Avi Kivity ha scritto:
> Oh, agree 100% raw + native aio wants to bypass coroutines/threads
> completely.

Even posix-aio-compat can bypass coroutines.

> We could perhaps even avoid refcounting, by shutting down the device
> thread as part of hotunplug.

Yes, you "just" join the thread, ask it to exit, and not hot-unplug
until it's done.

> [could we also avoid refcounting by doing the equivalent of
> stop_machine() during hotunplug?]

That's quite an interesting alternative.

Paolo