Re: [PATCH 0/7] xen/events: bug fixes and some diagnostic aids

Julien Grall
2021-02-08T14:37:09Z

On 08/02/2021 14:20, Julien Grall wrote:
>>>> I believe this will be the case before our "lateeoi" handling is
>>>> becoming active (more precise: when our IRQ handler is returning to
>>>> handle_fasteoi_irq()), resulting in the possibility of the same race we
>>>> are experiencing now.
>>>
>>> I am a bit confused what you mean by "lateeoi" handling is becoming
>>> active. Can you clarify?
>>
>> See above: the next call of the handler should be allowed only after
>> xen_irq_lateeoi() for the IRQ has been called.
>>
>> If the handler is being called earlier we have the race resulting
>> in the WARN() splats.
>
> I feel it is dislike to understand race with just words. Can you provide

Sorry I meant difficult rather than dislike.

Cheers,

--
Julien Grall