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b=raGNwvTopKDH9qU+gA5p444Xie7lvVChefJPII2wYy8m/dzFMstcEcuECmyt9rYvgySrf0 PhnFct9wCzxEcrAA== 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 2FEFE133F1; Wed, 14 Oct 2026 07:47:00 +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 HCq5BHQzz2q9OQAAD6G6ig (envelope-from ); Wed, 14 Oct 2026 07:47:00 +0000 From: Daniel Wagner Date: Wed, 14 Oct 2026 09:46:43 +0200 Subject: [PATCH 5/5] nvme-fabrics: clear the poll map if no poll queues are mapped Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261014-nvme-fabrics-isolcpu-v1-5-355156be27b2@kernel.org> References: <20261014-nvme-fabrics-isolcpu-v1-0-355156be27b2@kernel.org> In-Reply-To: <20261014-nvme-fabrics-isolcpu-v1-0-355156be27b2@kernel.org> To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg Cc: Ming Lei , Surabhi Gogte , Hannes Reinecke , Nilay Shroff , Frederic Weisbecker , Aaron Tomlin , Maurizio Lombardi , Sebastian Andrzej Siewior , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, Daniel Wagner X-Mailer: b4 0.16.0 X-Rspamd-Action: no action X-Spam-Score: -3.51 X-Spam-Flag: NO X-Spamd-Result: default: False [-3.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_RHS_MATCH_TO(1.00)[]; 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)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[16]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RL71uuc3g3e76oxfn4mu5aogan)]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; DKIM_TRACE(0.00)[suse.de:+] X-Spam-Level: X-Rspamd-Queue-Id: 5DE7F2210A X-Rspamd-Server: rspamd2.dmz-prg2.suse.org From: Daniel Wagner blk_mq_alloc_tag_set sets the nr_queues of every map to nr_hw_queues. When nr_poll_queues is set but no queues are left for polling, nvmf_map_queues skips the poll map and leaves it this way, with all CPUs mapped to hctx 0. The queue then claims poll support, polled I/O ends up on hctx 0, which isn't a poll queue, and hctx 0 is marked as a poll hctx, so even the Connect command of the first I/O queue is marked as polled. Clear the poll map when no poll queues are mapped, so polled I/O is rejected with -EOPNOTSUPP. Fixes: 1a9460cef571 ("nvme-tcp: support simple polling") Fixes: 5651cd3c4336 ("nvme-rdma: fix queue mapping when queue count is limited") Signed-off-by: Daniel Wagner --- drivers/nvme/host/fabrics.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index 27a8ce51d2b3..3d7ad86c1955 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -1199,6 +1199,13 @@ void nvmf_map_queues(struct blk_mq_tag_set *set, struct nvme_ctrl *ctrl, io_queues[HCTX_TYPE_DEFAULT] + io_queues[HCTX_TYPE_READ]; blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]); + } else { + /* + * blk_mq_alloc_tag_set sets nr_queues of all maps to + * nr_hw_queues. Clear the poll map, otherwise the queue claims + * poll support and polled I/O ends up on hctx 0. + */ + set->map[HCTX_TYPE_POLL].nr_queues = 0; } dev_info(ctrl->device, -- 2.56.0