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



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



 


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