On 16/04/21 10:08, Vladimir Sementsov-Ogievskiy wrote:
With the following patch we want to call wake coroutine from thread.
And it doesn't work with aio_co_wake:
Assume we have no iothreads.
Assume we have a coroutine A, which waits in the yield point for
external aio_co_wake(), and no progress can be done until it happen.
Main thread is in blocking aio_poll() (for example, in blk_read()).
Now, in a separate thread we do aio_co_wake(). It calls aio_co_enter(),
which goes through last "else" branch and do aio_context_acquire(ctx).
I don't understand. Why doesn't aio_co_enter go through the ctx !=
qemu_get_current_aio_context() branch and just do aio_co_schedule? That
was at least the idea behind aio_co_wake and aio_co_enter.
Paolo
