32 GT/s PCI link speeds reporting "Unknown speed" in sysfs
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| linux (Ubuntu) |
In Progress
|
Medium
|
Ian May | ||
| Focal |
Fix Released
|
Medium
|
Ian May | ||
Bug Description
SRU Justification
[Impact]
NVIDIA Collective Communication Library software uses sysfs to report performance statistics. Users have reported entries showing "Unknown speed" when they should be reporting "32 GT/s".
Example:
"<pci busid="
PCIe 5.0 supports 32 GT/s and is available in the 5.4 kernel, but the patches for properly reporting speeds in sysfs are missing. The following upstream v5.7 patches add the reporting capability.
PCI ML submission
https://<email address hidden>/
Upstream Patches
https:/
[Test Plan]
Testing these speeds requires special hardware. A Test kernel with these patches applied was provided to the customer and they confirmed the proper numbers are reported.
[Where problems could occur]
Changes are for reporting info so chance of problems should be low. If a problem did occur it would be with sysfs or pcie driver misreporting speeds.
[Other]
SF-00333784
CVE References
| Changed in linux (Ubuntu): | |
| assignee: | nobody → Ian May (ian-may) |
| Changed in linux (Ubuntu Focal): | |
| assignee: | nobody → Ian May (ian-may) |
| Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote Missing required logs. | #1 |
| Changed in linux (Ubuntu): | |
| status: | New → Incomplete |
| Changed in linux (Ubuntu Focal): | |
| status: | New → Incomplete |
| description: | updated |
| Changed in linux (Ubuntu Focal): | |
| status: | Incomplete → In Progress |
| Changed in linux (Ubuntu): | |
| status: | Incomplete → In Progress |
| importance: | Undecided → High |
| Changed in linux (Ubuntu Focal): | |
| importance: | Undecided → High |
| description: | updated |
| description: | updated |
| Changed in linux (Ubuntu): | |
| importance: | High → Medium |
| Changed in linux (Ubuntu Focal): | |
| importance: | High → Medium |
| description: | updated |
| description: | updated |
| description: | updated |
| description: | updated |
| description: | updated |
| Changed in linux (Ubuntu Focal): | |
| status: | In Progress → Fix Committed |
| Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote | #2 |
| tags: | added: verification-needed-focal |
| Launchpad Janitor (janitor) wrote | #3 |
| Changed in linux (Ubuntu Focal): | |
| status: | Fix Committed → Fix Released |
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1970798
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.