Re: [Xen-devel] [PATCH] RFC: initial libxl support for xenpaging

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2012-02-17 at 15:43 +0000, Olaf Hering wrote:
> On Fri, Feb 17, Ian Campbell wrote:
> 
> > On Fri, 2012-02-17 at 15:24 +0000, Olaf Hering wrote:
> > > Where do you see the complexity?
> > 
> > For users in determining what changing a given value will actually do,
> > what values they need to use to get the behaviour which they want, what
> > happens if they change first one value and then the other, how do they
> > interact with mem-set and memmax, what are the various invalid or
> > meaningless combinations etc.
> > 
> > There's also complexity for us in trying to decide what the right answer
> > is to each of those questions and trying to implement it in a consistent
> > way and explain it all to users.
> 
> A figure like the one in tools/libxl/libxl_memory.txt will explain it
> very well, if done right.

That's exactly the sort of complexity we should not be exposing to the
end user!

It's bad enough us developers trying to keep it all the moving parts
straight in our heads...


> Perhaps I should write up something based on that figure.
> 
> Olaf



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