Re: [Qemu-devel] [PATCH v2 0/2] thread-pool: avoid fd usage and fix nested aio_poll() deadlock

[Paolo Bonzini]

Il 15/07/2014 16:44, Stefan Hajnoczi ha scritto:
> v2:
>  * Leave BH scheduled so that the code can be simplified [Paolo]
>
> These patches convert thread-pool.c from EventNotifier to QEMUBH.  They then
> solve the deadlock when nested aio_poll() calls are made.
>
> Please speak out whether you want this in QEMU 2.1 or not.  I'm not aware of
> the nested aio_poll() deadlock ever having been reported, so maybe we can defer
> to QEMU 2.2.

It was reported as a hang in block_commit.  Marcin, can you please test 
these patches?

Paolo