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Fri, 19 Sep 2025 07:51:20 -0700 (PDT) Message-ID: <57346868-0da1-49e0-834b-a5e5d26e7dc3@kernel.dk> Date: Fri, 19 Sep 2025 08:51:19 -0600 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: Pavel Begunkov , io-uring References: <0ee30a2f-4e36-4c0a-8e84-7da568da08d3@kernel.dk> <23a67fd6-0179-4578-82ef-cf796bea4346@gmail.com> Content-Language: en-US From: Jens Axboe In-Reply-To: <23a67fd6-0179-4578-82ef-cf796bea4346@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/19/25 8:06 AM, Pavel Begunkov wrote: > 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 Yeah I forgot it's SLAB_TYPESAFE_BY_RCU already. At least now it's just being yanked. -- Jens Axboe