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Wed, 7 Aug 2024 12:25:40 +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 /cv6DsRns2YzQQAAD6G6ig (envelope-from ); Wed, 07 Aug 2024 12:25:40 +0000 Date: Wed, 7 Aug 2024 14:25:39 +0200 From: Daniel Wagner To: Stefan Hajnoczi Cc: Jens Axboe , Keith Busch , Sagi Grimberg , Thomas Gleixner , Christoph Hellwig , "Martin K. Petersen" , John Garry , "Michael S. Tsirkin" , Jason Wang , Kashyap Desai , Sumit Saxena , Shivasharan S , Chandrakanth patil , Sathya Prakash Veerichetty , Suganath Prabu Subramani , Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, Jonathan Corbet , Frederic Weisbecker , Mel Gorman , Hannes Reinecke , Sridhar Balaraman , "brookxu.cn" , Ming Lei , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, virtualization@lists.linux.dev, megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com, storagedev@microchip.com, linux-doc@vger.kernel.org Subject: Re: [PATCH v3 00/15] honor isolcpus configuration Message-ID: References: <20240806-isolcpus-io-queues-v3-0-da0eecfeaf8b@suse.de> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-0.01 / 50.00]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FREEMAIL_TO(0.00)[gmail.com]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCPT_COUNT_TWELVE(0.00)[35]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCVD_TLS_ALL(0.00)[]; TO_DN_SOME(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[kernel.dk,kernel.org,grimberg.me,linutronix.de,lst.de,oracle.com,redhat.com,broadcom.com,marvell.com,lwn.net,suse.de,parallelwireless.com,gmail.com,vger.kernel.org,lists.infradead.org,lists.linux.dev,microchip.com]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; RCVD_VIA_SMTP_AUTH(0.00)[]; TAGGED_RCPT(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; MISSING_XM_UA(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[gitlab.com:url,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.de:email,suse.de:dkim] X-Spamd-Bar: / X-Rspamd-Queue-Id: 5CA421F396 X-Spam-Level: X-Rspamd-Action: no action X-Spam-Flag: NO X-Spam-Score: -0.01 On Tue, Aug 06, 2024 at 09:09:50AM GMT, Stefan Hajnoczi wrote: > On Tue, 6 Aug 2024 at 08:10, Daniel Wagner wrote: > > The only stall I was able to trigger > > reliable was with qemu's PCI emulation. It looks like when a CPU is > > offlined, the PCI affinity is reprogrammed but qemu still routes IRQs to > > an offline CPU instead to newly programmed destination CPU. All worked > > fine on real hardware. > > Hi Daniel, > Please file a QEMU bug report here (or just reply to this emails with > details on how to reproduce the issue and I'll file the issue on your > behalf): > https://gitlab.com/qemu-project/qemu/-/issues > > We can also wait until your Linux patches have landed if that makes it > easier to reproduce the bug. Thanks for the offer. I tried simplify the setup and come up with producer using qemu directly instead with libvirt. And now it works just fine. I'll try to figure out what the magic argument...