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b=YnCyshHamkIEPj2NoT8dQJusW0+D3ASUXdw3/qxf/x8lzgMdcId1FSjsB8l476pVcQlqJP u1ZLbzQheqnNkJDg== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 8D1973EA62; Mon, 16 Feb 2026 12:33:19 +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 +b2iBI8Ok2kqNAAAD6G6ig (envelope-from ); Mon, 16 Feb 2026 12:33:18 +0000 Message-ID: <7575cb2b-7af5-4748-9ae3-c0906c6dc2d6@suse.de> Date: Mon, 16 Feb 2026 13:33:16 +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 v3 07/21] nvme: Introduce FENCING and FENCED controller states To: Mohamed Khalfella , Justin Tee , Naresh Gottumukkala , Paul Ely , Chaitanya Kulkarni , Christoph Hellwig , Jens Axboe , Keith Busch , Sagi Grimberg , James Smart Cc: Aaron Dailey , Randy Jennings , Dhaval Giani , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260214042753.4073668-1-mkhalfella@purestorage.com> <20260214042753.4073668-8-mkhalfella@purestorage.com> Content-Language: en-US From: Hannes Reinecke In-Reply-To: <20260214042753.4073668-8-mkhalfella@purestorage.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Score: -4.51 X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FREEMAIL_TO(0.00)[purestorage.com,broadcom.com,gmail.com,nvidia.com,lst.de,kernel.dk,kernel.org,grimberg.me]; FUZZY_RATELIMITED(0.00)[rspamd.com]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_TWELVE(0.00)[15]; MIME_TRACE(0.00)[0:+]; 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]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:mid,suse.de:email]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:106:10:150:64:167:received,2a07:de40:b281:104:10:150:64:97:from]; DKIM_TRACE(0.00)[suse.de:+] X-Spam-Level: X-Rspamd-Action: no action X-Rspamd-Queue-Id: 062AA5BE73 X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO On 2/14/26 05:25, Mohamed Khalfella wrote: > FENCING is a new controller state that a LIVE controller enter when an > error is encountered. While in FENCING state,inflight IOs that timeout > are not canceled because they should be held until either CCR succeeds > or time-based recovery completes. While the queues remain alive requests > are not allowed to be sent in this state and the controller cannot be > reset or deleted. This is intentional because resetting or deleting the > controller results in canceling inflight IOs. > > FENCED is a short-term state the controller enters before it is reset. > It exists only to prevent manual resets from happening while controller > is in FENCING state. > > Signed-off-by: Mohamed Khalfella > --- > drivers/nvme/host/core.c | 27 +++++++++++++++++++++++++-- > drivers/nvme/host/nvme.h | 4 ++++ > drivers/nvme/host/sysfs.c | 2 ++ > 3 files changed, 31 insertions(+), 2 deletions(-) > 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