Re: [Qemu-devel] [PATCH 1/1] pci-host: add educational driver

[Jiri Slaby]

On 10/13/2014, 03:00 PM, Paolo Bonzini wrote:
>> +static void edu_dma_timer(void *opaque)
>> +{
>> +    EduState *edu = opaque;
>> +    bool raise_irq = false;
>> +
>> +    qemu_mutex_lock(&edu->dma_mutex);
> 
> dma_mutex and mutex and irq_mutex are not necessary.  All I/O happens
> under the big QEMU lock (qemu_lock/unlock_iothread).  I can certainly
> imagine that edu.c would be one of the first devices we make
> thread-safe, but... not yet. :)

Hi,

I finally got to it. I want to make sure that I understand this
correctly. So even timers are protected by the "BQL"?

thanks,
-- 
js
suse labs