| Posted | Nick | Remark | |
|---|---|---|---|
| #openstack-cyborg - 2026-07-28 | |||
| 12:59:21 | opendevreview | Joan Gilabert proposed openstack/cyborg-tempest-plugin master: Refactor PCI lifecycle tests https://review.opendev.org/c/openstack/cyborg-tempest-plugin/+/997936 | |
| 12:59:21 | opendevreview | Joan Gilabert proposed openstack/cyborg-tempest-plugin master: Add Cyborg MDEV driver lifecycle scenario tests https://review.opendev.org/c/openstack/cyborg-tempest-plugin/+/997352 | |
| 13:09:50 | chandankumar | cyborg irc meeting will start in another 50 mins, Add your agenda here: https://etherpad.opendev.org/p/openstack-cyborg-irc-meeting#L47 | |
| 14:00:54 | chandankumar | time for cyborg meeting! | |
| 14:01:01 | chandankumar | #startmeeting cyborg | |
| 14:01:01 | opendevmeet | Meeting started Tue Jul 28 14:01:01 2026 UTC and is due to finish in 60 minutes. The chair is chandankumar. Information about MeetBot at http://wiki.debian.org/MeetBot. | |
| 14:01:01 | opendevmeet | Useful Commands: #action #agreed #help #info #idea #link #topic #startvote. | |
| 14:01:01 | opendevmeet | The meeting name has been set to 'cyborg' | |
| 14:01:06 | jgilaber | o/ | |
| 14:01:10 | morenod | o/ | |
| 14:01:11 | chandankumar | who all are around? | |
| 14:01:11 | rlandy | o/ | |
| 14:01:46 | opendevreview | Gihong Lee proposed openstack/cyborg master: Add shared lspci helpers to common utils https://review.opendev.org/c/openstack/cyborg/+/998726 | |
| 14:01:54 | chandankumar | #courtesy ping sean-k-mooney amoralej | |
| 14:02:34 | chandankumar | Here is the link to agenda | |
| 14:02:42 | chandankumar | #link https://etherpad.opendev.org/p/openstack-cyborg-irc-meeting#L43 | |
| 14:02:56 | chandankumar | feel free to add there | |
| 14:03:05 | sean-k-mooney | o/ | |
| 14:03:13 | melwitt | o/ | |
| 14:03:40 | chandankumar | Let me start with the first topic | |
| 14:03:56 | chandankumar | #topic Proposal for pci-sim to support one device type per pf | |
| 14:04:06 | chandankumar | jgilaber: added it Add per-PF device type via pf_mode parameter | https://review.opendev.org/c/openstack/cyborg/+/998603 | |
| 14:04:17 | chandankumar | #link https://review.opendev.org/c/openstack/cyborg/+/998603 | |
| 14:04:19 | jgilaber | yes, we've discussed about this in the past | |
| 14:04:29 | jgilaber | since we plan to add mdevs and nvme emulation to pci-sim | |
| 14:04:40 | jgilaber | we need some interface for configuring that | |
| 14:04:53 | jgilaber | I've pushed that patch to propose one possibility | |
| 14:05:05 | jgilaber | and I'm looking for feedback before rebasing my mdev work on top of it | |
| 14:05:37 | jgilaber | it adds a 'pf_mode' parameter to the module | |
| 14:05:51 | jgilaber | which is a comma-separated list of types, one per pf | |
| 14:06:21 | jgilaber | e.g 'insmod fake_pci_sriov.ko num_pfs=2 pf_mode=sriov,mdev' would create two pfs, the first one sriov, the second with mdevs | |
| 14:06:50 | sean-k-mooney | that shoudl not be via kernel args | |
| 14:07:00 | sean-k-mooney | it shoudl be via per PF files in /sys | |
| 14:07:41 | sean-k-mooney | that the same feedback i gave to chandankumar for the nvm devices as well | |
| 14:08:05 | sean-k-mooney | each PF shoudl have a personality file that the pf reads to determin the type of VF to create | |
| 14:08:17 | sean-k-mooney | which you set before you allocate teh VFs | |
| 14:08:55 | sean-k-mooney | that is similar ot how vGPUs work and other hader deivce that supprot configurable types for there VFs | |
| 14:10:09 | jgilaber | so the user/devstack plugin creates those files? | |
| 14:10:10 | sean-k-mooney | basiclly /sys/bus/pci/devices/<PF>/vf_personality | |
| 14:10:31 | sean-k-mooney | when you mode prope the module it will create teh file | |
| 14:10:35 | opendevreview | Gihong Lee proposed openstack/cyborg master: Add shared lspci helpers to common utils https://review.opendev.org/c/openstack/cyborg/+/998726 | |
| 14:10:35 | opendevreview | Gihong Lee proposed openstack/cyborg master: Migrate accelerator drivers to shared lspci helpers https://review.opendev.org/c/openstack/cyborg/+/998817 | |
| 14:10:40 | sean-k-mooney | and you need to write the desired value to it | |
| 14:11:05 | sean-k-mooney | we shoudl also have a /sys/bus/pci/devices/<PF>/vf_personalitys that list the avlaible type space seperated | |
| 14:11:39 | sean-k-mooney | that or follow the cpu governors nameing convetion of adding _avaialble | |
| 14:12:13 | jgilaber | ok I see | |
| 14:12:21 | sean-k-mooney | [15:11:16]> cat /sys/bus/cpu/devices/cpu0/cpufreq/scaling_governor | |
| 14:12:23 | sean-k-mooney | ─────┬───────────────────────────────────────────────────────────────────────────────────────────── | |
| 14:12:25 | sean-k-mooney | │ File: /sys/bus/cpu/devices/cpu0/cpufreq/scaling_governor | |
| 14:12:27 | sean-k-mooney | ─────┼───────────────────────────────────────────────────────────────────────────────────────────── | |
| 14:12:29 | sean-k-mooney | 1 │ powersave | |
| 14:12:31 | sean-k-mooney | ─────┴───────────────────────────────────────────────────────────────────────────────────────────── | |
| 14:12:33 | sean-k-mooney | ~ via 🐹 v1.25.12 via python: v3.14.6 on ☁️ smooney@redhat.com | |
| 14:12:35 | sean-k-mooney | [15:12:08]> cat /sys/bus/cpu/devices/cpu0/cpufreq/scaling_available_governors | |
| 14:12:37 | sean-k-mooney | ─────┬───────────────────────────────────────────────────────────────────────────────────────────── | |
| 14:12:39 | sean-k-mooney | │ File: /sys/bus/cpu/devices/cpu0/cpufreq/scaling_available_governors | |
| 14:12:40 | jgilaber | from UX side it seems a bit more cumbersome | |
| 14:12:41 | sean-k-mooney | ─────┼───────────────────────────────────────────────────────────────────────────────────────────── | |
| 14:12:43 | sean-k-mooney | 1 │ performance powersave | |
| 14:12:45 | sean-k-mooney | ─────┴──────────── | |
| 14:12:57 | sean-k-mooney | the module approch forces you do reload the module to change it | |
| 14:13:08 | sean-k-mooney | and it does not allwo you to eaislly do this on a per device basis | |
| 14:13:21 | jgilaber | that's true | |
| 14:13:41 | chandankumar | sean-k-mooney: jgilaber I was trying to come out like this https://gistpreview.github.io/?9cf18df5754db0948330f0cc5110c652 but not yet implemented | |
| 14:14:43 | sean-k-mooney | skiming that that is mostly aligned on the sysfs interface to configure this | |
| 14:14:54 | sean-k-mooney | basiclly secitn 6 | |
| 14:15:31 | sean-k-mooney | we will need to document this in the contibutor docs for the module and cpature the logic as part of this work | |
| 14:15:49 | sean-k-mooney | jgilaber: the other option woudl be to have multiple modules that we load seperatly | |
| 14:15:53 | sean-k-mooney | with a shared core | |
| 14:15:59 | sean-k-mooney | i.e. one per fake device type | |
| 14:16:13 | sean-k-mooney | but i was kind fo hoping to only need one module for htis in general | |
| 14:16:47 | jgilaber | yeah, I'll try to rework the patch with this new approach | |
| 14:17:02 | jgilaber | and we can discuss again | |
| 14:17:17 | sean-k-mooney | so i think we need to spit this out into its won commit | |
| 14:17:36 | sean-k-mooney | i.e. one commit that intoduces the personatiy file reporting and configuration with just uart for now | |
| 14:17:49 | sean-k-mooney | the you can chandan can hopefully build on that in parallel | |
| 14:18:06 | sean-k-mooney | otherwise we will have to sequence both feature to not confilct | |
| 14:18:20 | jgilaber | yes, that is what I did already. The linked patch does not have the mdev bits | |
| 14:19:04 | sean-k-mooney | ah https://review.opendev.org/c/openstack/cyborg/+/998603 | |
| 14:19:10 | sean-k-mooney | ok so that is just the config interface | |
| 14:19:35 | sean-k-mooney | i woudl not be agaisn haveing module option to have a shorthand way to preallocate soem device fo a specifi tyep as well | |
| 14:19:44 | sean-k-mooney | i.e. UART=2 NVME=4 | |
| 14:19:55 | sean-k-mooney | buti still think the sysfs way is more flexible | |
| 14:20:32 | chandankumar | what about bringing both the approach and revisit in next meeting? | |
| 14:20:38 | jgilaber | ack, thanks for the feedback, I got what I need to continue | |
| 14:20:50 | sean-k-mooney | basiclly i woudl like to have a clean way to be able to do soemtihng like pci_sim_toplogy=uart:nova,nvme:cyborg,mdev:cyborg | |
| 14:20:50 | jgilaber | a note on timeline, I'll be on PTO starting Aug 5th | |
| 14:21:12 | sean-k-mooney | and have devstack create 3 pf assign 1 to nova and 2 to cyborg ectra | |
| 14:21:16 | jgilaber | so ideally it would be good to advance on this before the next meeting | |
| 14:21:37 | sean-k-mooney | i think we can contiue the fonvcertion here and in gerrit | |
| 14:21:45 | jgilaber | +1 | |
| 14:21:45 | sean-k-mooney | we dont need to wait for the meeting to make progress | |
| 14:21:52 | chandankumar | sounds good | |
| 14:22:20 | chandankumar | Any more questions on this topic? | |
| 14:22:56 | chandankumar | moving to next one | |
| 14:23:04 | chandankumar | #topic Fix for guest reboot test | |
| 14:23:24 | chandankumar | jgilaber is working on fixing guest reboot test | |
| 14:23:29 | chandankumar | below are the reviews | |
| 14:23:40 | chandankumar | #link 998283: Ensure guest is not reachable after reboot | https://review.opendev.org/c/openstack/cyborg-tempest-plugin/+/998283 | |
| 14:23:49 | jgilaber | yes, I see sean-k-mooney has already reviewed it, thanks | |