Re: [PATCH] evtchn: double per-channel locking can't hit identical channels

[Julien Grall <julien@xxxxxxx>]

Hi Jan,

On 24/11/2020 17:03, Jan Beulich wrote:
> Inter-domain channels can't possibly be bound to themselves, there's
> always a 2nd channel involved, even when this is a loopback into the
> same domain. As a result we can drop one conditional each from the two
> involved functions.
>
> With this, the number of evtchn_write_lock() invocations can also be
> shrunk by half, swapping the two incoming function arguments instead.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall