linux-kernel - RE: [PATCH v4] cxl/events: Use a common struct for DRAM and General Media events

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Date: Tue, 21 May 2024 08:59:28 -0700
From: Dan Williams <dan.j.williams@...el.com>
To: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>, "Davidlohr
 Bueso" <dave@...olabs.net>, Jonathan Cameron <jonathan.cameron@...wei.com>,
	Dave Jiang <dave.jiang@...el.com>, 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>,
	<linux-cxl@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
Subject: RE: [PATCH v4] cxl/events: Use a common struct for DRAM and General
 Media events

Fabio M. De Francesco wrote:
> cxl_event_common was an unfortunate naming choice and caused confusion with
> the existing Common Event Record. Furthermore, its fields didn't map all
> the common information between DRAM and General Media Events.
> 
> Remove cxl_event_common and introduce cxl_event_media_hdr to record common
> information between DRAM and General Media events.
> 
> cxl_event_media_hdr, which is embedded in both cxl_event_gen_media and
> cxl_event_dram, leverages the commonalities between the two events to
> simplify their respective handling.
> 
> Suggested-by: Dan Williams <dan.j.williams@...el.com>
> Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@...ux.intel.com>
> ---
> 
> - Changes for v4 -
> 
> 	- Initialise cxl_test_dram and cxl_test_gen_media without 
> 	  unnecessary extra de-references (Dan)
> 	- Add a comment for media_hdr in union cxl_event (Alison)
> 
> - Changes for v3 -
> 
> 	- Rework the layout of cxl_event_dram and cxl_event_gen_media to
> 	  make a simpler change (Dan)
> 	- Remove a "Fixes" tag (Dan)
> 	- Don't use unnecessary struct_group[_tagged] (Jonathan, Ira)
> 	- Rewrite end extend the commit message
> 
> - Link to v3 -
> 
> https://lore.kernel.org/linux-cxl/20240518113317.3683718-1-fabio.m.de.francesco@linux.intel.com/
> 
>  drivers/cxl/core/mbox.c      |  2 +-
>  drivers/cxl/core/trace.h     | 32 ++++++++++-----------
>  include/linux/cxl-event.h    | 41 ++++++++++-----------------
>  tools/testing/cxl/test/mem.c | 54 +++++++++++++++++++-----------------
>  4 files changed, 61 insertions(+), 68 deletions(-)

LGTM

Reviewed-by: Dan Williams <dan.j.williams@...el.com>