Re: [Qemu-devel] [PATCH] main-loop: Don't lock starve io-threads when main_loop_tlg has pending events

[Paolo Bonzini]

Il 08/10/2013 22:16, Hans de Goede ha scritto:
> No, it is calling main_loop_wait with nonblocking set to 0, so
> normally the lock would get released. But
> timerlistgroup_deadline_ns(&main_loop_tlg) is returning 0,
> causing timeout_ns to be 0, and this causes the lock to not get
> released.

Yes, this was my understanding of the patch as well.  Before Alex's
series, this would be capped to MIN_REARM_TIMER_NS (250 us).  This is
why I mentioned 250 us.

However, I agree with Alex that it looks a bit fishy and I'd like to
know what timer is it that is continuously set to expire in the past.

Paolo