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Re: Lockup with --accel tcg,thread=single


From: Alex Bennée
Subject: Re: Lockup with --accel tcg,thread=single
Date: Tue, 01 Oct 2019 16:28:03 +0100
User-agent: mu4e 1.3.4; emacs 27.0.50

Paolo Bonzini <address@hidden> writes:

> On 01/10/19 10:42, Alex Bennée wrote:
>>
>> Paolo Bonzini <address@hidden> writes:
>>
>>> On 30/09/19 21:20, Alex Bennée wrote:
>>>> Does seem to imply the vCPU CPUState is where the queue is. That's not
>>>> to say there shouldn't be a single work queue for thread=single.
>>>
>>> Indeed it doesn't.  I confused this with commit a8efa60633 ("cpus: run
>>> work items for all vCPUs if single-threaded", 2018-11-27).
>>>
>>> Are you going to make a patch to have a single work queue, or should
>>> I?
>>
>> What's the neatest way to do it? Are you thinking just special case
>> queue_work_on_cpu to special case first_cpu when mttcg is not enabled?
>
> Yes, I cannot think of anything better.

And I am immediately stymied by the fact that cpus-common is a common
blob so can't have differentiation for SOFTMMU cases in it.

Did you have a look at:

  Date: Mon, 30 Sep 2019 17:38:15 +0100
  Message-ID: <address@hidden>

Is that too ugly?

>
> Paolo


--
Alex Bennée



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