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([2a01:4b00:bd21:4f00:7cc6:d3ca:494:116c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4613f3c69d5sm128189055e9.24.2025.09.19.07.04.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 19 Sep 2025 07:04:47 -0700 (PDT) Message-ID: <23a67fd6-0179-4578-82ef-cf796bea4346@gmail.com> Date: Fri, 19 Sep 2025 15:06:23 +0100 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] io_uring/msg_ring: kill alloc_cache for io_kiocb allocations To: Jens Axboe , io-uring References: <0ee30a2f-4e36-4c0a-8e84-7da568da08d3@kernel.dk> Content-Language: en-US From: Pavel Begunkov In-Reply-To: <0ee30a2f-4e36-4c0a-8e84-7da568da08d3@kernel.dk> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/18/25 21:04, Jens Axboe wrote: > A recent commit: > > fc582cd26e88 ("io_uring/msg_ring: ensure io_kiocb freeing is deferred for RCU") > > fixed an issue with not deferring freeing of io_kiocb structs that I didn't care to mention before, but that patch was doing nothing meaningful, adding a second RCU grace period rarely solves anything. If you're curious what the problem most likely is, see commit 569f5308e54352a12181cc0185f848024c5443e8 Author: Pavel Begunkov Date: Wed Aug 9 13:22:16 2023 +0100 io_uring: fix false positive KASAN warnings -- Pavel Begunkov