Attached is the opinion of the Crossbow project, submitted for PSARC
review by December 2nd 2008.
Since the commitment review, the project team needed to make four minor
changes. The changes were motivated by internal and external feed-back from
early adopters and Beta customers, and by the integration with other
consumers of the project interfaces.
The changes do not constitute any architectural depart from the original
specifications voted on, therefore, I'm including them in this opinion.
In the case directory, final.materials has the exact specifications,
taking into account the commitment review TCR and spec updates.
The revised.materials directory there includes the four changes below.
I can file a separate fasttrack to cover these changes if members believe it
is necessary.
- Phased delivery of the some of the resource controls.
Initially, maxbw (maximum bandwidth), priority, cpus and fanout properties
were approved for flows and datalinks.
The support of the cpus property for flows and the fanout property for
flows and datalinks are now targeted after the first integration.
All other properties, are still supported, and provide sufficient added
value for the first phase.
- Add a -H option to dladm show-phys and dladm create-vnic.
One of the projects added value is exposing a CLI to control the
assignment
of some of the NICs hardware resources to MAC clients (i.e. VNICs).
At commitment time, factory MAC addresses were the only such hardware
resource.
The need for controlling the assignment of Receive Rings became
increasingly
obvious during the implementation and Beta testing, thus the -H option.
- The integration with new features of LDOMs required the ability to
allow an exclusive MAC client to set the interface's MTU,
thus a new Consolidation Private MAC client function: mac_set_mtu().
- A limitation in the multi-threadedness of a major NIC device driver
necessitated the addition of a flag to request the serialization
of transmit operations submitted to that driver.
A new flag needed to be added to the Consolidation Private MAC provider
interface (MAC_VIRT_SERIALIZE flag of the mac_register_t's m_v12n).
Kais.
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