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#openstack-nova - 2021-06-22
16:14:05 gibi this needs to be backported I think
16:14:10 gibi hm
16:14:23 gibi no\
16:14:24 gibi sorry
16:14:32 gibi I'm not sure
16:15:28 gibi that fix helps with the detach issue on master where we have the new notification based detach
16:15:46 sean-k-mooney it would need to be backported to any release using the events?
16:15:56 sean-k-mooney but not where we poll?
16:16:12 sean-k-mooney so if we backport the events based detach we need to backport both
16:16:30 gibi sean-k-mooney: that is my understanding yes
16:16:42 elodilles I saw lot of failures in victoria as I said, can it be valid backport there?
16:17:18 sean-k-mooney i think its a relitivly safe backport in either case
16:17:36 gibi elodilles: the detach modification is pretty huge patch but it does not change external interfaces
16:17:51 sean-k-mooney gibi: did we backport your events patch to victoria?
16:17:53 gibi so from process perspective it is backportable
16:17:57 gibi sean-k-mooney: no
16:18:02 gibi I dont think so
16:18:20 elodilles anyway, that sound good (except that it's a huge patch :S), I'll add this to my TODO to investigate :)
16:18:29 sean-k-mooney so the failure on vicotria are proably not related to OPERATION_FAILED
16:18:44 gibi sean-k-mooney: yeah
16:18:45 sean-k-mooney elodilles: wehre they OPERATION_FAILED specifcialy or was it just detach failures
16:19:20 elodilles well, the usual error: volume ... failed to detach (in XXXX state ) something
16:19:46 sean-k-mooney ok then that is likely not related to https://review.opendev.org/c/openstack/nova/+/796255
16:19:50 gibi sean-k-mooney: I dont think nova logs the sepcific error code
16:19:53 elodilles :-/
16:19:58 sean-k-mooney we can review after the meeting if you have an example
16:20:23 elodilles sure, thanks!
16:20:25 gibi ack
16:20:28 sean-k-mooney gibi: we might see it in the libvirt log in the ci run not sure but just a guess
16:20:34 gibi ok
16:20:42 gibi any other stable related issue?
16:21:16 elodilles nothing else i think :X
16:22:37 gibi #topic Sub/related team Highlights
16:22:42 gibi Libvirt (bauzas)
16:22:45 bauzas just one thing, we discussed about https://review.opendev.org/c/openstack/nova/+/769614 about how to help operators to know about a behaviour modification for a libvirt issue
16:23:05 bauzas we had some argument about some relnote reno section
16:23:08 bauzas but,
16:23:16 bauzas eventually, I +Wd the fix
16:23:53 gibi bauzas: what is the summary?
16:24:00 bauzas do we need to create some better way to tell operators that we no longer verify the cpu topologies ?
16:24:09 sean-k-mooney yes just noticed if you really wanted me to update it i was ok with that just wanted you and stephenfin to agree on a path forward
16:24:26 bauzas gibi: this ^
16:24:58 bauzas basically, flavors could continue to have the same extraspecs
16:25:06 stephenfin bauzas: I'm still not sure what you're asking for. Are you suggesting we drop the 'upgrade' section?
16:25:18 bauzas stephenfin: no, not about this
16:25:45 bauzas stephenfin: about whether we would need more some kind of documentation for this
16:25:50 stephenfin oh, that
16:26:03 sean-k-mooney oh ok you were conserened if we needed to document it at all
16:26:10 sean-k-mooney not how we did it
16:26:10 bauzas yup
16:26:29 sean-k-mooney ok i tought you just wanted it in the fixes section so i missed that in your previous comments
16:26:33 stephenfin My personal opinion is no. We never documented this behaviour and we never agreed to guarantee it. I wanted to include the release note simply as a courtesy
16:26:39 bauzas basically, the flavors would continue to be the same, it's just the libvirt driver that won't longer verify them
16:26:54 stephenfin similar to how we announce virt API changes, even though we don't support out-of-tree virt drivers
16:27:16 stephenfin I think you've misunderstood things. Nothing changes in what we verify
16:27:21 sean-k-mooney well its not about verificaiotn is that we change unspecified behavior to different unspecifed behavior
16:27:27 bauzas stephenfin: fair enough, I'm having the same opinion but I'm asking the community here if they have concerns
16:27:34 stephenfin yes, what Sean said
16:28:05 gibi if we are changing undefined behavior then reno is just an extra, but not at all mandatory.
16:28:06 stephenfin we had a hidden behavior where we would try to match the number of guest CPU "threads" to the number of host CPU threads
16:28:25 stephenfin but it was hidden. We didn't even know it existed until sean-k-mooney started fixing this bug
16:28:28 bauzas yes, just a performance kind of help
16:28:37 stephenfin exactly. An optimization at most
16:28:47 bauzas okay, any concerns ?
16:28:52 bauzas if not, I'm OK
16:28:59 gibi I'm Ok too
16:29:20 gibi stephenfin, sean-k-mooney: is is settled from your perspective too?
16:29:25 stephenfin no issues from me
16:29:33 sean-k-mooney yep
16:29:41 sean-k-mooney i did not have a stong opiion
16:29:42 bauzas k, that's it for me
16:29:50 gibi ok, thanks
16:29:57 gibi #topic Open discussion
16:30:03 gibi there is one topic
16:30:07 gibi (wenpingsong) vGPU spec reviewing: as we discussed during ptg, cyborg-managed/nova-managed gpu should have a trait indicating who owns this gpu, thanks for bauzas's comments with different thoughts about the trait. We need to have an agreement on that. https://review.opendev.org/c/openstack/nova-specs/+/780452 (can't attending the meeting due to the time slot, but will check the logs later)
16:30:33 gibi as far as I understand we originally suggested the owner traits
16:30:43 gibi but bauzas now suggest using separate RC
16:30:49 gibi for cyborg managed vgpus
16:30:56 gibi this way the trait would not be needed
16:30:56 sean-k-mooney both could work
16:31:10 bauzas my -1 was just for discussing about it
16:31:25 gibi I guess we don't have the use case: Give me a vgpu I don't care if it is cyborg or nova managed
16:31:30 bauzas given I was also working on the mdev spec
16:31:40 bauzas I thought about it
16:31:43 sean-k-mooney owner traits i guess could have upgrade issues
16:31:49 bauzas and I'm not sure we need a "nova" trait
16:31:51 sean-k-mooney e.g. if you upgrade cyborg first
16:31:59 sean-k-mooney without upgrading nova to support owner traits
16:32:07 bauzas I know tho we said we would do it at some PTG
16:32:19 bauzas so I'm sorry to reopen the can
16:32:44 sean-k-mooney well no i think there is a usecase for a nova triat
16:32:51 sean-k-mooney or well RP ownwer in general
16:32:56 sean-k-mooney not nessiarly a trait
16:33:33 bauzas it's the other way of a consumer type :)
16:33:45 bauzas something like a inventory type :)
16:33:49 sean-k-mooney so its a provider type :)
16:33:58 bauzas yeah
16:34:24 bauzas tbh, I don't really like us marking traits for things unnecessary
16:34:43 sean-k-mooney am would it be better to continue this discsssuon on the spec. was tehre a summary you wanted to give in real time
16:34:51 bauzas agreed

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