RE: [PATCH v4] cxl/region: Add dev_dbg() detail on failure to allocate HPA space

[Dan Williams <dan.j.williams@intel.com>]

alison.schofield@ wrote:
> From: Alison Schofield <alison.schofield@intel.com>
> 
> When the region driver fails while allocating HPA space for a
> new region it can be because the parent resource, the CXL Window,
> has no more available space.
> 
> In that case, the debug user sees this message:
> cxl_core:alloc_hpa:555: cxl region2: failed to allocate HPA: -34
> 
> Expand the message like this:
> cxl_core:alloc_hpa:555: cxl region8: HPA allocation error (-34) for size:0x20000000 in CXL Window 0 [mem 0xf010000000-0xf04fffffff flags 0x200]
> 
> Now the debug user can examine /proc/iomem and consider actions
> like removing other allocations in that space or reducing the
> size of their region request.
> 
> Suggested-by: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Alison Schofield <alison.schofield@intel.com>
> Reviewed-by: Dave Jiang <dave.jiang@intel.com>
> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
> Reviewed-by: Fan Ni <fan.ni@samsung.com>
> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
> ---
> 
> Dan - Let me know if you need a separate patch as this is already
> in cxl/next

I went ahead and took Randy's incremental fixup for this reason.