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Tue, 3 Feb 2026 03:28:47 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id e6IOCm9rgWllBwAAD6G6ig (envelope-from ); Tue, 03 Feb 2026 03:28:47 +0000 Message-ID: Date: Tue, 3 Feb 2026 04:28:44 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 06/14] nvme: Rapid Path Failure Recovery read controller identify fields To: Mohamed Khalfella , Justin Tee , Naresh Gottumukkala , Paul Ely , Chaitanya Kulkarni , Christoph Hellwig , Jens Axboe , Keith Busch , Sagi Grimberg Cc: Aaron Dailey , Randy Jennings , Dhaval Giani , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260130223531.2478849-1-mkhalfella@purestorage.com> <20260130223531.2478849-7-mkhalfella@purestorage.com> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20260130223531.2478849-7-mkhalfella@purestorage.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_TWELVE(0.00)[14]; FREEMAIL_TO(0.00)[purestorage.com,broadcom.com,gmail.com,nvidia.com,lst.de,kernel.dk,kernel.org,grimberg.me]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email,purestorage.com:email] X-Spam-Flag: NO X-Spam-Score: -4.30 X-Spam-Level: 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 > --- > 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 Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich