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Thu, 22 Jan 2026 16:18:47 +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 tdYkGOdNcmmjFAAAD6G6ig (envelope-from ); Thu, 22 Jan 2026 16:18:47 +0000 From: Gabriel Krisman Bertazi To: Pavel Begunkov Cc: io-uring@vger.kernel.org, axboe@kernel.dk Subject: Re: [PATCH v3 1/1] io_uring: introduce non-circular SQ In-Reply-To: <80368e4b-9148-40d0-bd52-1507fef68055@gmail.com> (Pavel Begunkov's message of "Wed, 21 Jan 2026 21:55:18 +0000") References: <87a4y6esjj.fsf@mailhost.krisman.be> <80368e4b-9148-40d0-bd52-1507fef68055@gmail.com> Date: Thu, 22 Jan 2026 11:18:41 -0500 Message-ID: <87ldhpd3j2.fsf@mailhost.krisman.be> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; 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)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; MIME_TRACE(0.00)[0:+]; TAGGED_RCPT(0.00)[]; FREEMAIL_TO(0.00)[gmail.com]; TO_DN_SOME(0.00)[]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:104:10:150:64:97:from,2a07:de40:b281:106:10:150:64:167:received]; DKIM_TRACE(0.00)[suse.de:+] X-Spam-Flag: NO X-Spam-Score: -4.51 X-Rspamd-Queue-Id: F1E365BCCF X-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spam-Level: Pavel Begunkov writes: > On 1/21/26 18:20, Gabriel Krisman Bertazi wrote: >> and immediately some fixed data, etc. When I want to run it, I push a >> SQE OP_EXECUTE pointing to this buffer to the "main" ring and io_uring >> will queue everything in this pre-registered buffer. >> I imagine it would save nothing beyond SQ initialization. just curious >> if you see a use case for something like this? > > You already can do it with the sq array. Never heard of anyone > using it, but liburing never exposed it to users either. Thanks for the explanation. make sense! -- Gabriel Krisman Bertazi