From: Cornelia Huck <cohuck@redhat.com>
To: Sean Mooney <smooney@redhat.com>
Cc: Jiri Pirko <jiri@mellanox.com>, Yan Zhao <yan.y.zhao@intel.com>,
Jason Wang <jasowang@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
kvm@vger.kernel.org, libvir-list@redhat.com,
qemu-devel@nongnu.org, kwankhede@nvidia.com, eauger@redhat.com,
xin-ran.wang@intel.com, corbet@lwn.net,
openstack-discuss@lists.openstack.org, shaohe.feng@intel.com,
kevin.tian@intel.com, eskultet@redhat.com,
jian-feng.ding@intel.com, dgilbert@redhat.com,
zhenyuw@linux.intel.com, hejie.xu@intel.com,
bao.yumeng@zte.com.cn, intel-gvt-dev@lists.freedesktop.org,
berrange@redhat.com, dinechin@redhat.com, devel@ovirt.org,
Parav Pandit <parav@mellanox.com>
Subject: Re: device compatibility interface for live migration with assigned devices
Date: Fri, 7 Aug 2020 13:59:42 +0200 [thread overview]
Message-ID: <20200807135942.5d56a202.cohuck@redhat.com> (raw)
In-Reply-To: <4cf2824c803c96496e846c5b06767db305e9fb5a.camel@redhat.com>
On Wed, 05 Aug 2020 12:35:01 +0100
Sean Mooney <smooney@redhat.com> wrote:
> On Wed, 2020-08-05 at 12:53 +0200, Jiri Pirko wrote:
> > Wed, Aug 05, 2020 at 11:33:38AM CEST, yan.y.zhao@intel.com wrote:
(...)
> > > software_version: device driver's version.
> > > in <major>.<minor>[.bugfix] scheme, where there is no
> > > compatibility across major versions, minor versions have
> > > forward compatibility (ex. 1-> 2 is ok, 2 -> 1 is not) and
> > > bugfix version number indicates some degree of internal
> > > improvement that is not visible to the user in terms of
> > > features or compatibility,
> > >
> > > vendor specific attributes: each vendor may define different attributes
> > > device id : device id of a physical devices or mdev's parent pci device.
> > > it could be equal to pci id for pci devices
> > > aggregator: used together with mdev_type. e.g. aggregator=2 together
> > > with i915-GVTg_V5_4 means 2*1/4=1/2 of a gen9 Intel
> > > graphics device.
> > > remote_url: for a local NVMe VF, it may be configured with a remote
> > > url of a remote storage and all data is stored in the
> > > remote side specified by the remote url.
> > > ...
> just a minor not that i find ^ much more simmple to understand then
> the current proposal with self and compatiable.
> if i have well defiend attibute that i can parse and understand that allow
> me to calulate the what is and is not compatible that is likely going to
> more useful as you wont have to keep maintianing a list of other compatible
> devices every time a new sku is released.
>
> in anycase thank for actully shareing ^ as it make it simpler to reson about what
> you have previously proposed.
So, what would be the most helpful format? A 'software_version' field
that follows the conventions outlined above, and other (possibly
optional) fields that have to match?
(...)
> > Thanks for the explanation, I'm still fuzzy about the details.
> > Anyway, I suggest you to check "devlink dev info" command we have
> > implemented for multiple drivers.
>
> is devlink exposed as a filesytem we can read with just open?
> openstack will likely try to leverage libvirt to get this info but when we
> cant its much simpler to read sysfs then it is to take a a depenency on a commandline
> too and have to fork shell to execute it and parse the cli output.
> pyroute2 which we use in some openstack poject has basic python binding for devlink but im not
> sure how complete it is as i think its relitivly new addtion. if we need to take a dependcy
> we will but that would be a drawback fo devlink not that that is a large one just something
> to keep in mind.
A devlinkfs, maybe? At least for reading information (IIUC, "devlink
dev info" is only about information retrieval, right?)
next prev parent reply other threads:[~2020-08-07 12:00 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 23:29 device compatibility interface for live migration with assigned devices Yan Zhao
2020-07-14 10:21 ` Daniel P. Berrangé
2020-07-14 12:33 ` Sean Mooney
[not found] ` <20200714110148.0471c03c@x1.home>
[not found] ` <eb705c72cdc8b6b8959b6ebaeeac6069a718d524.camel@redhat.com>
2020-07-14 21:15 ` Sean Mooney
2020-07-14 16:16 ` Alex Williamson
2020-07-14 16:47 ` Daniel P. Berrangé
2020-07-14 20:47 ` Alex Williamson
2020-07-15 9:16 ` Daniel P. Berrangé
2020-07-14 17:19 ` Dr. David Alan Gilbert
2020-07-14 20:59 ` Alex Williamson
2020-07-15 8:20 ` Yan Zhao
2020-07-15 8:49 ` Feng, Shaohe
2020-07-17 14:59 ` Alex Williamson
2020-07-17 18:03 ` Dr. David Alan Gilbert
2020-07-17 18:30 ` Alex Williamson
2020-07-15 8:23 ` Dr. David Alan Gilbert
[not found] ` <CAH7mGatPWsczh_rbVhx4a+psJXvkZgKou3r5HrEQTqE7SqZkKA@mail.gmail.com>
2020-07-17 15:18 ` Alex Williamson
2020-07-16 4:16 ` Jason Wang
2020-07-16 8:32 ` Yan Zhao
2020-07-16 9:30 ` Jason Wang
2020-07-17 16:12 ` Alex Williamson
2020-07-20 3:41 ` Jason Wang
2020-07-20 10:39 ` Sean Mooney
2020-07-21 2:11 ` Jason Wang
2020-07-21 0:51 ` Yan Zhao
2020-07-27 7:24 ` Yan Zhao
2020-07-27 22:23 ` Alex Williamson
2020-07-29 8:05 ` Yan Zhao
2020-07-29 11:28 ` Sean Mooney
2020-07-29 19:12 ` Alex Williamson
2020-07-30 3:41 ` Yan Zhao
2020-07-30 13:24 ` Sean Mooney
2020-07-30 17:29 ` Alex Williamson
2020-08-04 8:37 ` Yan Zhao
2020-08-05 9:44 ` Dr. David Alan Gilbert
2020-07-30 1:56 ` Yan Zhao
2020-07-30 13:14 ` Sean Mooney
2020-08-04 16:35 ` Cornelia Huck
2020-08-05 2:22 ` Jason Wang
2020-08-05 2:16 ` Yan Zhao
2020-08-05 2:41 ` Jason Wang
2020-08-05 7:56 ` Jiri Pirko
2020-08-05 8:02 ` Jason Wang
2020-08-05 9:33 ` Yan Zhao
2020-08-05 10:53 ` Jiri Pirko
2020-08-05 11:35 ` Sean Mooney
2020-08-07 11:59 ` Cornelia Huck [this message]
2020-08-13 15:33 ` Cornelia Huck
2020-08-13 19:02 ` Eric Farman
2020-08-17 6:38 ` Cornelia Huck
2020-08-10 7:46 ` Yan Zhao
2020-08-13 4:24 ` Jason Wang
2020-08-14 5:16 ` Yan Zhao
2020-08-14 12:30 ` Sean Mooney
2020-08-17 1:52 ` Yan Zhao
2020-08-18 3:24 ` Jason Wang
2020-08-18 8:55 ` Daniel P. Berrangé
2020-08-18 9:06 ` Cornelia Huck
2020-08-18 9:24 ` Daniel P. Berrangé
2020-08-18 9:38 ` Cornelia Huck
[not found] ` <3a073222-dcfe-c02d-198b-29f6a507b2e1@redhat.com>
2020-08-18 9:16 ` Daniel P. Berrangé
2020-08-18 9:36 ` Cornelia Huck
2020-08-18 9:39 ` Parav Pandit
2020-08-19 3:30 ` Yan Zhao
2020-08-19 5:58 ` Parav Pandit
2020-08-19 9:41 ` Jason Wang
2020-08-19 6:57 ` [ovirt-devel] " Jason Wang
2020-08-19 6:59 ` Yan Zhao
2020-08-19 7:39 ` Jason Wang
2020-08-19 8:13 ` Yan Zhao
2020-08-19 9:28 ` Jason Wang
2020-08-20 12:27 ` Cornelia Huck
2020-08-21 3:14 ` Jason Wang
2020-08-21 14:52 ` Cornelia Huck
2020-08-31 3:07 ` Jason Wang
2020-08-19 17:50 ` Alex Williamson
2020-08-20 0:18 ` Yan Zhao
2020-08-20 3:13 ` Alex Williamson
2020-08-20 3:09 ` Yan Zhao
2020-08-19 2:54 ` Jason Wang
2020-08-20 0:39 ` Yan Zhao
2020-08-20 1:29 ` Sean Mooney
2020-08-20 4:01 ` Yan Zhao
2020-08-20 5:16 ` Sean Mooney
2020-08-20 6:27 ` Yan Zhao
2020-08-20 13:24 ` Sean Mooney
2020-08-26 8:54 ` Yan Zhao
2020-08-20 3:22 ` Alex Williamson
2020-08-20 3:16 ` Yan Zhao
2020-08-25 14:39 ` Cornelia Huck
2020-08-26 6:41 ` Yan Zhao
2020-08-28 13:47 ` Cornelia Huck
2020-08-28 14:04 ` Sean Mooney
2020-08-31 4:43 ` Yan Zhao
2020-09-08 14:41 ` Cornelia Huck
2020-09-09 2:13 ` Yan Zhao
2020-09-10 12:38 ` Cornelia Huck
2020-09-10 12:50 ` Sean Mooney
2020-09-10 18:02 ` Alex Williamson
2020-09-11 0:56 ` Yan Zhao
2020-09-11 10:08 ` Cornelia Huck
2020-09-11 10:18 ` Tian, Kevin
2020-09-11 16:51 ` Alex Williamson
2020-09-14 13:48 ` Zeng, Xin
2020-09-14 14:44 ` Alex Williamson
2020-09-09 5:37 ` Yan Zhao
2020-08-31 2:23 ` Yan Zhao
2020-08-19 2:38 ` Jason Wang
2020-08-18 9:32 ` Parav Pandit
2020-08-19 2:45 ` Jason Wang
2020-08-19 5:26 ` Parav Pandit
2020-08-19 6:48 ` Jason Wang
2020-08-19 6:53 ` Parav Pandit
2020-07-29 19:05 ` Dr. David Alan Gilbert
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