On Thu, 20 Aug 2020 08:39:22 +0800 Yan Zhao <yan.y.zhao@intel.com> wrote:
On Tue, Aug 18, 2020 at 11:36:52AM +0200, Cornelia Huck wrote:
On Tue, 18 Aug 2020 10:16:28 +0100 Daniel P. Berrangé <berrange@redhat.com> wrote:
On Tue, Aug 18, 2020 at 05:01:51PM +0800, Jason Wang wrote:
On 2020/8/18 下午4:55, Daniel P. Berrangé wrote:
On Tue, Aug 18, 2020 at 11:24:30AM +0800, Jason Wang wrote:
On 2020/8/14 下午1:16, Yan Zhao wrote:
On Thu, Aug 13, 2020 at 12:24:50PM +0800, Jason Wang wrote:
On 2020/8/10 下午3:46, Yan Zhao wrote:
we actually can also retrieve the same information through sysfs, .e.g
|- [path to device] |--- migration | |--- self | | |---device_api | | |---mdev_type | | |---software_version | | |---device_id | | |---aggregator | |--- compatible | | |---device_api | | |---mdev_type | | |---software_version | | |---device_id | | |---aggregator
Yes but:
- You need one file per attribute (one syscall for one attribute) - Attribute is coupled with kobject
Is that really that bad? You have the device with an embedded kobject anyway, and you can just put things into an attribute group?
[Also, I think that self/compatible split in the example makes things needlessly complex. Shouldn't semantic versioning and matching already cover nearly everything? I would expect very few cases that are more complex than that. Maybe the aggregation stuff, but I don't think we need that self/compatible split for that, either.] Hi Cornelia,
The reason I want to declare compatible list of attributes is that sometimes it's not a simple 1:1 matching of source attributes and target attributes as I demonstrated below, source mdev of (mdev_type i915-GVTg_V5_2 + aggregator 1) is compatible to target mdev of (mdev_type i915-GVTg_V5_4 + aggregator 2), (mdev_type i915-GVTg_V5_8 + aggregator 4)
and aggragator may be just one of such examples that 1:1 matching does not fit.
If you're suggesting that we need a new 'compatible' set for every aggregation, haven't we lost the purpose of aggregation? For example, rather than having N mdev types to represent all the possible aggregation values, we have a single mdev type with N compatible migration entries, one for each possible aggregation value. BTW, how do we have multiple compatible directories? compatible0001, compatible0002? Thanks, Alex