linux-kernel - Re: [PATCH v4 11/14] cxl/region: Add a dev

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Message-ID: <2827426.aRXLXkqSa3@fdefranc-mobl3>
Date: Wed, 23 Apr 2025 22:49:20 +0200
From: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
To: Alison Schofield <alison.schofield@...el.com>,
 Vishal Verma <vishal.l.verma@...el.com>, Ira Weiny <ira.weiny@...el.com>,
 Dan Williams <dan.j.williams@...el.com>,
 Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 Dave Jiang <dave.jiang@...el.com>, Davidlohr Bueso <dave@...olabs.net>,
 Robert Richter <rrichter@....com>
Cc: linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org,
 Gregory Price <gourry@...rry.net>, Terry Bowman <terry.bowman@....com>,
 Robert Richter <rrichter@....com>
Subject:
 Re: [PATCH v4 11/14] cxl/region: Add a dev_warn() on registration failure

On Thursday, March 6, 2025 5:44:45 PM Central European Summer Time Robert Richter wrote:
> Esp. in complex system configurations with multiple endpoints and
> interleaving setups it is hard to detect region setup failures as its
> registration may silently fail. Add messages to show registration
> failures.
> 
> Example log message:
> 
>   cxl region5: region sort successful
>   cxl region5: mem0:endpoint5 decoder5.0 add: mem0:decoder5.0 @ 0 next: none nr_eps: 1 nr_targets: 1
>   cxl_port endpoint5: decoder5.0: range: 0x22350000000-0x2634fffffff iw: 1 ig: 256
>   cxl region5: pci0000:e0:port1 decoder1.2 add: mem0:decoder5.0 @ 0 next: mem0 nr_eps: 1 nr_targets: 1
>   cxl region5: pci0000:e0:port1 iw: 1 ig: 256
>   cxl region5: pci0000:e0:port1: decoder1.2 expected 0000:e0:01.2 at 0
>   cxl endpoint5: failed to attach decoder5.0 to region5: -6
>   cxl_port endpoint5: probe: 0
> 
> Signed-off-by: Robert Richter <rrichter@....com>
> Reviewed-by: Gregory Price <gourry@...rry.net>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> Tested-by: Gregory Price <gourry@...rry.net>
> ---

Reviewed-by: Fabio M. De Francesco <fabio.m.de.francesco@...ux.intel.com>