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Re: [Qemu-devel] [PATCH v2] qtest: Fix deadloop by running main loop AIO


From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH v2] qtest: Fix deadloop by running main loop AIO context's timers
Date: Fri, 13 Feb 2015 09:46:33 +0000
User-agent: Mutt/1.5.23 (2014-03-12)

On Mon, Jan 19, 2015 at 05:51:43PM +0800, Fam Zheng wrote:
> qemu_clock_run_timers() only takes care of main_loop_tlg, we shouldn't
> forget aio timer list groups.
> 
> Currently, the qemu_clock_deadline_ns_all (a few lines above) counts all
> the timergroups of this clock type, including aio tlg, but we don't fire
> them, so they are never cleared, which makes a dead loop.
> 
> For example, this function hangs when trying to drive throttled block
> request queue with qtest clock_step.
> 
> Signed-off-by: Fam Zheng <address@hidden>
> 
> ---
> v2: Only run QEMU_CLOCK_VIRTUAL events. (Paolo).
> ---
>  cpus.c | 4 ++++
>  1 file changed, 4 insertions(+)

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan

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