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Fri, 28 Jun 2024 06:23:57 +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 EP1NK/1WfmZ4ewAAD6G6ig (envelope-from ); Fri, 28 Jun 2024 06:23:57 +0000 Message-ID: <9f86cc6b-c18f-4696-a134-767beea24d23@suse.de> Date: Fri, 28 Jun 2024 08:23:57 +0200 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/3] blk-mq: add blk_mq_num_possible_queues helper Content-Language: en-US To: Daniel Wagner , Jens Axboe , Keith Busch , Sagi Grimberg , Thomas Gleixner , Christoph Hellwig Cc: Frederic Weisbecker , Mel Gorman , Sridhar Balaraman , "brookxu.cn" , Ming Lei , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org References: <20240627-isolcpus-io-queues-v2-0-26a32e3c4f75@suse.de> <20240627-isolcpus-io-queues-v2-1-26a32e3c4f75@suse.de> From: Hannes Reinecke In-Reply-To: <20240627-isolcpus-io-queues-v2-1-26a32e3c4f75@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-2.79 / 50.00]; BAYES_HAM(-3.00)[100.00%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; URIBL_BLOCKED(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:email]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; TAGGED_RCPT(0.00)[]; RCPT_COUNT_TWELVE(0.00)[14]; RCVD_TLS_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[suse.com,suse.de,parallelwireless.com,gmail.com,redhat.com,vger.kernel.org,lists.infradead.org]; MID_RHS_MATCH_FROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_COUNT_TWO(0.00)[2]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:email] X-Spam-Flag: NO X-Spam-Score: -2.79 X-Spam-Level: On 6/27/24 16:10, Daniel Wagner wrote: > Multi queue devices which use managed IRQs should only allocate queues > for the housekeeping CPUs when isolcpus is set. This avoids that the > isolated CPUs get disturbed with OS workload. > > Add a helper which calculates the correct number of queues which should > be used. > > Signed-off-by: Daniel Wagner > --- > block/blk-mq-cpumap.c | 20 ++++++++++++++++++++ > include/linux/blk-mq.h | 1 + > 2 files changed, 21 insertions(+) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich