Re: [RFC] /dev/ioasid uAPI proposal

[Enrico Weigelt, metux IT consult]

On 04.06.21 14:30, Jason Gunthorpe wrote:

Hi,

> Containers already needed to do this today. Container orchestration is
> hard.

Yes, but I hate to see even more work upcoming here.

> Yes, /dev/ioasid shouldn't do anything unless you have a device to
> connect it with. In this way it is probably safe to stuff it into
> every container.

Okay, if we can guarantee that, I'm completely fine.

> > > Having FDs spawn other FDs is pretty ugly, it defeats the "everything
> > > is a file" model of UNIX.
> >
> > Unfortunately, this is already defeated in many other places :(
> > (I'd even claim that ioctls already break it :p)
>
> I think you are reaching a bit :)
>
> > It seems your approach also breaks this, since we now need to open two
> > files in order to talk to one device.
>
> It is two devices, thus two files.

Two separate real (hardware) devices or just two logical device nodes ?


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
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