Re: State of NET_MPSAFE in -9 and/or -current?

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

On Thu, Mar 10, 2022 at 3:19 AM Brian Buhrow <buhrow%nfbcal.org@localhost> wrote:
>
>         hello.  I'm wondering if someone could comment on the state of using NET_MPSAFE kernels?
> Is it ready for production use yet?
> -thanks
> -Brian
>

It depends on your machine(s) and usages.

doc/TODO.smpnet[1] lists up MP-safe components.  If you need to use components
in the "Unprotected ones" (sub)section, we can clearly say NET_MPSAFE kernels
are not ready for production.  Otherwise, you may be able to use
NET_MPSAFE kernels
in production.  Actually we've used NET_MPSAFE kernels based on NetBSD 8 for
a couple of years in production as routers.

[1] http://cvsweb.netbsd.org/bsdweb.cgi/src/doc/TODO.smpnet?rev=1.45&content-type=text/x-cvsweb-markup&only_with_tag=MAIN

Note that as you can see from the list above, Layer 4 protocols
including TCP and UDP are
not MP-safe yet.  So using NET_MPSAFE kernels as servers or clients is
probably not
performant.

  ozaki-r