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

[Marcin Gibuła]

W dniu 2014-07-15 17:17, Paolo Bonzini pisze:
> 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?

I try to test it tomorrow. The same hang was also in linux-aio however 
(I was able to reproduce it).

--
mg