Re: [PATCH v5 09/13] xen: add cache coloring allocator for domains

[Julien Grall <julien@xxxxxxx>]

Hi Carlo,

On 18/01/2024 14:27, Carlo Nonato wrote:
> On Tue, Jan 9, 2024 at 11:33 AM Jan Beulich <jbeulich@xxxxxxxx> wrote:
> > On 09.01.2024 11:28, Jan Beulich wrote:
> > > On 02.01.2024 10:51, Carlo Nonato wrote:
> > > > v5:
> > > > - Carlo Nonato as the new author
> > > > - the colored allocator balances color usage for each domain and it searches
> > > >    linearly only in the number of colors (FIXME removed)
> > > While this addresses earlier concerns, meanwhile NUMA work has also
> > > been progressing. What's the plan of interaction of coloring with it?
> > Thinking of interactions - what about static memory? Is coloring incompatible
> > with that? If so, should the two features be excluded to both be used at the
> > same time?
> This was done in one of the earlier revisions. Then it was dropped because
> we thought that it would have been better to have a binary that supported both
> static memory and coloring. The only checks are done at runtime.
I actually prefer the runtime checks if they are not too complicated. 
This would allow distro to ship a generic Xen where user can play with 
various (incompatible) configuration without any rebuild.
Cheers,

--
Julien Grall