Re: [PATCH v3 3/8] xen/events: avoid handling the same event on two cpus at the same time

[Julien Grall <julien@xxxxxxx>]

Hi Juergen,

On 19/02/2021 15:40, Juergen Gross wrote:
> When changing the cpu affinity of an event it can happen today that
> (with some unlucky timing) the same event will be handled on the old
> and the new cpu at the same time.
>
> Avoid that by adding an "event active" flag to the per-event data and
> call the handler only if this flag isn't set.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Reported-by: Julien Grall <julien@xxxxxxx>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall