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Mon, 16 Feb 2026 08:23:22 -0800 (PST) Received: from [192.168.1.150] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d4a75309bcsm13026533a34.1.2026.02.16.08.23.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 16 Feb 2026 08:23:21 -0800 (PST) Message-ID: Date: Mon, 16 Feb 2026 09:23:20 -0700 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] io_uring: document advise SQE field reuse for 64-bit lengths To: redacherkaoui , io-uring@vger.kernel.org Cc: linux-kernel@vger.kernel.org References: <20260216161426.10810-1-redacherkaoui67@gmail.com> Content-Language: en-US From: Jens Axboe In-Reply-To: <20260216161426.10810-1-redacherkaoui67@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 2/16/26 9:14 AM, redacherkaoui wrote: > IORING_OP_FADVISE and IORING_OP_MADVISE reuse SQE fields to > support 64-bit lengths without extending struct io_uring_sqe. > > For IORING_OP_FADVISE, the length is carried in sqe->addr when > non-zero, with sqe->len providing legacy fallback. > > For IORING_OP_MADVISE, the length is carried in sqe->off when > non-zero, with sqe->len providing legacy fallback. > > This differs from the more common addr/off/len interpretation > used by many other opcodes and can be confusing when constructing > SQEs manually. > > Document the field mapping in the UAPI header to clarify the > intended behavior and reduce the risk of misuse. Like I asked you before, what on earth is this patch against? Stop re-sending the same stuff without answering the question. -- Jens Axboe