** Description changed: 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="0000:0c:00.0" class="0x020700" vendor="0x15b3" device="0x1021" subsystem_vendor="0x15b3" subsystem_device="0x0082" link_speed="Unknown speed" link_width="16">" 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 patches add the reporting capability. + following upstream v5.7 patches add the reporting capability. - https://lore.kernel.org/linux- - pci/20200229030706.17835-1-helg...@kernel.org/ + PCI ML submission + https://lore.kernel.org/linux-pci/20200229030706.17835-1-helg...@kernel.org/ + + Upstream Patches + https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9cb3985af63555810bb07de50acdf4170771451d + + https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e56faff57f0b39661093c00e0262d4ab9088830e + + https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6348a34dcb98d8e285685a205f2a601817fa2d38 + + https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=757bfaa2c3515803dde9a6728bbf8c8a3c5f098a + [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
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1970798 Title: 32 GT/s PCI link speeds reporting "Unknown speed" in sysfs Status in linux package in Ubuntu: In Progress Status in linux source package in Focal: In Progress 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="0000:0c:00.0" class="0x020700" vendor="0x15b3" device="0x1021" subsystem_vendor="0x15b3" subsystem_device="0x0082" link_speed="Unknown speed" link_width="16">" 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://lore.kernel.org/linux-pci/20200229030706.17835-1-helg...@kernel.org/ Upstream Patches https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9cb3985af63555810bb07de50acdf4170771451d https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e56faff57f0b39661093c00e0262d4ab9088830e https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6348a34dcb98d8e285685a205f2a601817fa2d38 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=757bfaa2c3515803dde9a6728bbf8c8a3c5f098a [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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970798/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
