linux-kernel - Re: [PATCH v2 06/14] nvme: Rapid Path Failure Recovery read controller identify fields

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Message-ID: <b68ef0bb-c6b4-4646-921d-4dcbf9e1ddb7@suse.de>
Date: Tue, 3 Feb 2026 04:28:44 +0100
From: Hannes Reinecke <hare@...e.de>
To: Mohamed Khalfella <mkhalfella@...estorage.com>,
 Justin Tee <justin.tee@...adcom.com>,
 Naresh Gottumukkala <nareshgottumukkala83@...il.com>,
 Paul Ely <paul.ely@...adcom.com>, Chaitanya Kulkarni <kch@...dia.com>,
 Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
 Keith Busch <kbusch@...nel.org>, Sagi Grimberg <sagi@...mberg.me>
Cc: Aaron Dailey <adailey@...estorage.com>,
 Randy Jennings <randyj@...estorage.com>,
 Dhaval Giani <dgiani@...estorage.com>, linux-nvme@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 06/14] nvme: Rapid Path Failure Recovery read
 controller identify fields

On 1/30/26 23:34, Mohamed Khalfella wrote:
> TP8028 Rapid path failure added new fileds to controller identify
> response. Read CIU (Controller Instance Uniquifier), CIRN (Controller
> Instance Random Number), and CCRL (Cross-Controller Reset Limit) from
> controller identify response. Expose CIU and CIRN as sysfs attributes
> so the values can be used directrly by user if needed.
> 
> TP4129 KATO Corrections and Clarifications defined CQT (Command Quiesce
> Time) which is used along with KATO (Keep Alive Timeout) to set an upper
> limit for attempting Cross-Controller Recovery.
> 
> Signed-off-by: Mohamed Khalfella <mkhalfella@...estorage.com>
> ---
>   drivers/nvme/host/core.c  |  5 +++++
>   drivers/nvme/host/nvme.h  | 11 +++++++++++
>   drivers/nvme/host/sysfs.c | 23 +++++++++++++++++++++++
>   3 files changed, 39 insertions(+)
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@...e.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich