Re: [Qemu-devel] [PATCH] thread-pool: fix deadlock when callbacks depends on each other

[Marcin Gibuła]

> > I'll test it tomorrow. I assume you want to avoid calling
> > event_notifier_set() until function is reentered via aio_pool?
>
> Yes.  But actually, I need to check if it's possible to fix
> bdrv_drain_all.  If you're in coroutine context, you can defer the
> draining to a safe point using a bottom half.  If you're not in
> coroutine context, perhaps bdrv_drain_all has to be made illegal.  Which
> means a bunch of code auditing...

For what it's worth, your solution also works fine, I couldn't recreate 
hang with it. Updated patch proposal posted earlier today.

--
mg