Re: NetBSD/usermode status

[r0ller <r0ller%freemail.hu@localhost>]

Hi Kamil,

Thanks! I'll give it a try.

Best regards,
r0ller​​​​​​​
-------- Eredeti levél --------
Feladó: Kamil Rytarowski < n54%gmx.com@localhost (Link -> mailto:n54%gmx.com@localhost) >
Dátum: 2017 április 30 11:01:59
Tárgy: Re: NetBSD/usermode status
Címzett: r0ller < netbsd-users%netbsd.org@localhost (Link -> mailto:netbsd-users%netbsd.org@localhost) >
 
I was told that usermode kernel requires custom hosting kernel with the
following module: sys/arch/usermode/modules/syscallemu
To build the usermode kernel we need to perform something similar to:
cd /usr/src/sys/arch/amd64/conf
config GENERIC_USERMODE
cd ../compile/GENERIC_USERMODE
make depend
make
To run it:
./netbsd
There is need to resurrect build of it.
Currently there might be no support to run the usermode version without
NetBSD kernel on host.
On 29.04.2017 14:08, r0ller wrote:
> Hi Greg,
>
> Yepp, that I know, that's why I asked it:) However, as the question is
> rather about the overhead of running code in one or the other way I
> asked jym at NetBSD who told that -besides the fact that only
> measurement can tell- based on his gut feeling, usermode should have
> less overhead if we don't take into account I/O.
>
> Best regards,
> r0ller
>
> -------- Eredeti levél --------
> Feladó: Greg Troxel < gdt%lexort.com@localhost (Link -> mailto:gdt%lexort.com@localhost) >
> Dátum: 2017 április 29 11:51:10
> Tárgy: Re: NetBSD/usermode status
> Címzett: r0ller < r0ller%freemail.hu@localhost (Link -> mailto:r0ller%freemail.hu@localhost) >
>
> r0ller <r0ller%freemail.hu@localhost> writes:
>> By the way, does anyone know what would be faster: NetBSD domU on
>> NetBSD/Xen dom0 or NetBSD/usermode?
> That's a good question, but if you want a reliable setup to actually run
> something, I would recommend Xen. There are a lot of people running
> NetBSD/Xen, and I am not aware of a lot of NetBSD/userland use.