Re: [Qemu-devel] [RFC] block: Removed coroutine ownership assumption

[Peter Maydell]

On 22 June 2012 09:20, Peter Crosthwaite
<address@hidden> wrote:
> Its a machine model that instantiated some block devices concurrently.
> Theres some chicken-and-egg issues with the instantiation such that
> they have the happen concurrently. One device instantiates a block
> device (pflash_cfi_01) from coroutine context. block then check
> qemu_in_coroutine() which returns true so it uses my coroutine for its
> inner workings, whereas if it were a normal machine model it would
> kick of its own coroutine to do its block stuff.

I think the problem here is trying to instantiate bits of the
machine model inside coroutines -- that just sounds wrong to me.
Model and device instantiate should be a straightforward single
threaded bit of code; if it isn't then something needs to be
straightened out so you don't have your chicken-and-egg problem.

-- PMM