[Ksummit-discuss] [CORE TOPIC] Redesign Memory Management layer and more core subsystem

[Christoph Lameter]

On Fri, 13 Jun 2014, Greg KH wrote:

> On Fri, Jun 13, 2014 at 11:57:04AM -0500, Christoph Lameter wrote:
> > On Thu, 12 Jun 2014, John W. Linville wrote:
> >
> > > AF_PACKET provides some level of hardware abstraction without a lot of
> > > overhead for networking apps that are prepared to deal with raw frames.
> > > Is this the kind of networking API you would propose?
> >
> > The kernel is still in the data path and will cause limitations in terms
> > of bandwidth and latency.
>
> Of course it will, nothing is "free".  If this is a problem, then run
> one of the many different networking stacks that are in userspace that
> are tailored to a specific use-case.  The kernel has to provide a
> "general" use case stack, that is its job.

But again I want both. A general stack that allows at least the data path
to go direct to the device. The metadata and connection management etc
should be firmly in the hand of the kernel.