linux-kernel - Re: [PATCH 04/26] cxl/region: Add dynamic capacity decoder and region modes

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Date: Fri, 5 Apr 2024 17:01:31 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Ira Weiny <ira.weiny@...el.com>, Fan Ni <fan.ni@...sung.com>,
 Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 Navneet Singh <navneet.singh@...el.com>
Cc: Dan Williams <dan.j.williams@...el.com>,
 Davidlohr Bueso <dave@...olabs.net>,
 Alison Schofield <alison.schofield@...el.com>,
 Vishal Verma <vishal.l.verma@...el.com>, linux-btrfs@...r.kernel.org,
 linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/26] cxl/region: Add dynamic capacity decoder and region
 modes



On 4/5/24 11:19 AM, Ira Weiny wrote:
> Dave Jiang wrote:
>>
>>
>> On 3/24/24 4:18 PM, ira.weiny@...el.com wrote:
>>> From: Navneet Singh <navneet.singh@...el.com>
>>>
>>> Region mode must reflect a general dynamic capacity type which is
>>> associated with a specific Dynamic Capacity (DC) partitions in each
>>> device decoder within the region.  DC partitions are also know as DC
>>> regions per CXL 3.1.
>>
>> This section reads somewhat awkward to me. Does this read any better?
>>
>> One or more Dynamic Capacity (DC) partitions (and decoders) form a CXL
>> software region. The region mode reflects composition of that entire software
>> region. Decoder mode reflects a specific DC partition. DC partitions are also
>> known as DC regions per CXL specification r3.1 but is not the same entity as
>> CXL software regions.
> 
> Yea that does sound better but I think this builds on your text and is even
> more clear.
> 
> <commit>
> cxl/region: Add dynamic capacity decoder and region modes
> 
> One or more decoders each pointing to a Dynamic Capacity (DC) partition form a
> CXL software region.  The region mode reflects composition of that entire
> software region.  Decoder mode reflects a specific DC partition.  DC partitions
> are also known as DC regions per CXL specification r3.1 but they are not the
> same entity as CXL software regions.
> 
> Define the new modes and helper functions required to make the association
> between these new modes.
> 
> </commit>
> 

LGTM
> 
> Ira