[Qemu-devel] [RFC PATCH 0/9] main-loop: refactor qemu_system_*_request()

[Anthony Liguori]

We essentially open code eight difference bottom half
implementations for all of the various qemu_system_*_request()
functions.  All these functions need is to defer a bit of work to
the I/O thread since they are often called in the VCPU threads.

This can be trivially implemented in terms of a bottom half without
touching the main loop.  That's what this series does.

I've used g_idle_add instead of a bottom half to avoid dealing with
life cycle tracking of the bottom half.

It looks like Xen has it's own main loop logic for the ioreq thread
and relies on the global reset/shutdown values.  It's weird to me
that it doesn't require all of them.  Nonetheless, I'm hoping Stefano
can help figure out what to do here.  It seems like Xen shouldn't need
it's own loop...

I've done "medium" testing on this series and everything seems to
work.  My regression tests pass and I've manually tested most of
entry points but only on a Linux host.