[Qemu-block] interesting blog post about asynchronous execution

[Paolo Bonzini]

This is about the experience with asynchronous execution in Midori (a
research OS written at Microsoft in a C#-like language, which was later
turned into a playground for features to be added to C#):

http://joeduffyblog.com/2015/11/19/asynchronous-everything/

Some parts will definitely ring a bell, because the QEMU block layer has
the same distinction between "await" and "async", only calls them
bdrv_co_* and bdrv_aio_*.

Paolo