svn commit: r356120 - head/sys/security/mac

[Mateusz Guzik]

On 12/27/19, Hans Petter Selasky <hps at selasky.org> wrote:
> On 2019-12-27 12:33, Ronald Klop wrote:
>> Wow, this looks like a winner.
>>
>> Ronald.
>
> Is this a spin-off from epoch methodology?
>
> It is possible to use epoch as a part of read mostly locking too.
>

epoch uses explicit fences which are a completely unnecessary cost for
this usecase.

This is rmlocks with priority propagation removed and with an extra hack
to signal do send extra IPIs if any of the target CPUs got caught in
executing the fast path.

-- 
Mateusz Guzik <mjguzik gmail.com>