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Wed, 18 Feb 2026 17:43:44 -0800 (PST) Received: from c7-smtp-2023.dev.purestorage.com ([208.88.159.129]) by smtp-relay.gmail.com with ESMTPS id 00721157ae682-7980516ad33sm705197b3.2.2026.02.18.17.43.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Feb 2026 17:43:44 -0800 (PST) X-Relaying-Domain: purestorage.com Received: from dev-csander.dev.purestorage.com (dev-csander.dev.purestorage.com [10.112.29.101]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id 4C28634027F; Wed, 18 Feb 2026 18:43:43 -0700 (MST) Received: by dev-csander.dev.purestorage.com (Postfix, from userid 1557716354) id 39FFEE41D2F; Wed, 18 Feb 2026 18:43:43 -0700 (MST) From: Caleb Sander Mateos To: Jens Axboe , Christoph Hellwig , Keith Busch , Sagi Grimberg Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, Caleb Sander Mateos Subject: [PATCH v2 0/4] io_uring/uring_cmd: allow non-iopoll cmds with IORING_SETUP_IOPOLL Date: Wed, 18 Feb 2026 18:43:31 -0700 Message-ID: <20260219014335.9061-1-csander@purestorage.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260218_174346_225239_7C6968F1 X-CRM114-Status: GOOD ( 14.52 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Currently, creating an io_uring with IORING_SETUP_IOPOLL requires all requests issued to it to support iopoll. This prevents, for example, using ublk zero-copy together with IORING_SETUP_IOPOLL, as ublk zero-copy buffer registrations are performed using a uring_cmd. There's no technical reason why these non-iopoll uring_cmds can't be supported. They will either complete synchronously or via an external mechanism that calls io_uring_cmd_done(), so they don't need to be polled. Allow uring_cmd requests to be issued to IORING_SETUP_IOPOLL io_urings even if their files don't implement ->uring_cmd_iopoll(). Use a new REQ_F_IOPOLL flag to track whether a request is using iopoll. This makes the iopoll_queue opcode definition flag unnecessary. The last commit removes an unnecessary IO_URING_F_IOPOLL check in nvme_dev_uring_cmd() as NVMe admin passthru commands can be issued to IORING_SETUP_IOPOLL io_urings now. v2: - Add REQ_F_IOPOLL request flag, remove redundant iopoll_queue - Split IORING_OP_URING_CMD128 fix to a separate commit Caleb Sander Mateos (4): io_uring: add REQ_F_IOPOLL io_uring: remove iopoll_queue from struct io_issue_def io_uring/uring_cmd: allow non-iopoll cmds with IORING_SETUP_IOPOLL nvme: remove nvme_dev_uring_cmd() IO_URING_F_IOPOLL check drivers/nvme/host/ioctl.c | 4 ---- include/linux/io_uring_types.h | 3 +++ io_uring/io_uring.c | 10 ++++------ io_uring/opdef.c | 10 ---------- io_uring/opdef.h | 2 -- io_uring/rw.c | 11 ++++++----- io_uring/uring_cmd.c | 9 ++++----- 7 files changed, 17 insertions(+), 32 deletions(-) -- 2.45.2