Re: [RFC PATCH] resource: Fix CXL node not populated issue

[Raghavendra K T]

On 12/6/2024 1:20 PM, Dan Williams wrote:
> Raghavendra K T wrote:
> >
[...]
> > B. /proc/iomem
> >
> > $ vimdiff success fail
> >
> >    4050000000-604fffffff : Soft Reserved
> >     |  164 4050000000-604fffffff : Soft Reserved
> >     165   4050000000-604fffffff : CXL Window 0
> >          |  165   4050000000-604fffffff : CXL Window 0
> >     166     4080000000-5fffffffff : dax1.0
> >          |
> > ------------------------------------------------------------------------
> >     167       4080000000-5fffffffff : System RAM (kmem)
> >          |
> > --------------------------------------------------------------------
>
> My eyes only know how to read unified diff (diff -u) format. Is this
> saying that in the failure case the System RAM range for dax1.0 is
> missing?


Sorry for that formatting. I realized later.
Yes. dax1.0 missing in the failure case.

Looks like problem is that,

4050000000-604fffffff : Soft Reserved
  4050000000-604fffffff : CXL Window 0
     4080000000-5fffffffff : dax1.0
        4080000000-5fffffffff : System RAM (kmem)

this use case where,

|A<------------->D|  CXL window
|..|B<-->C|.......|    kmem

B->C range that falls within A->D as in above somehow
not covered after the patch.

Thanks and Regards
- Raghu