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dkim=none Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id 1A20C13357; Wed, 3 Apr 2024 16:44:33 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap2.dmz-prg2.suse.org with ESMTPSA id JkBNAHGHDWboDQAAn2gu4w (envelope-from ); Wed, 03 Apr 2024 16:44:33 +0000 From: Gabriel Krisman Bertazi To: axboe@kernel.dk Cc: io-uring@vger.kernel.org, Gabriel Krisman Bertazi Subject: [PATCH liburing 2/2] man/io_uring_setup.2: Improve IORING_SETUP_REGISTERED_FD_ONLY documentation Date: Wed, 3 Apr 2024 12:44:13 -0400 Message-ID: <20240403164413.16398-3-krisman@suse.de> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240403164413.16398-1-krisman@suse.de> References: <20240403164413.16398-1-krisman@suse.de> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: 5.31 X-Spam-Flag: NO X-Spamd-Bar: +++++ X-Spamd-Result: default: False [5.31 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; TO_DN_SOME(0.00)[]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:104:10:150:64:98:from]; NEURAL_HAM_LONG(-1.00)[-1.000]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MX_GOOD(-0.01)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(2.20)[]; MIME_TRACE(0.00)[0:+]; RCVD_IN_DNSWL_HI(-0.50)[2a07:de40:b281:106:10:150:64:167:received]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-0.08)[63.85%] X-Spam-Level: ***** X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 6840B372CB Document that IORING_SETUP_REGISTERED_FD_ONLY depends on IORING_SETUP_NO_MMAP being set. Closes: https://github.com/axboe/liburing/issues/1087 Signed-off-by: Gabriel Krisman Bertazi --- man/io_uring_setup.2 | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/man/io_uring_setup.2 b/man/io_uring_setup.2 index f65c1f2..888e82b 100644 --- a/man/io_uring_setup.2 +++ b/man/io_uring_setup.2 @@ -325,6 +325,9 @@ file descriptor. The caller will need to use .B IORING_REGISTER_USE_REGISTERED_RING when calling .BR io_uring_register (2). +This flag only makes sense when used alongside with +.B IORING_SETUP_NO_MMAP, +which also needs to be set. Available since 6.5. .TP @@ -690,6 +693,10 @@ was not, or was specified, but .I io_uring_params.cq_entries was invalid. +.B IORING_SETUP_REGISTERED_FD_ONLY +was specified, but +.B IORING_SETUP_NO_MMAP +was not. .TP .B EMFILE The per-process limit on the number of open file descriptors has been -- 2.44.0