Hi Tim,
>From currently test, any platform add this patch a89c82249c37 ("PCI: Work
>around PCIe link training failures"). might happen this issue. Just hot
>remove/hotplug onboard nvme device will reproduce this issue.
I will check with our test engineer whether the ubuntu test environment is
reserved.
Thanks,
Dong
--
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/2100828
Title:
ubuntu-24.04: Root port link speed degradation to 2.5GT/s after nvme
hot plug
Status in linux package in Ubuntu:
New
Bug description:
We found a kenrel issue on Redhat 9.4 and 9.5.
nvme pcie link speed will downgrade to 2.5GT/s after hotplug.
After analysis, we found this patch casued this issue:
a89c82249c37 ("PCI: Work around PCIe link training failures").
This patch also merged into ubuntu 24.04, therefore, this issue will also
occur on 24.04.
The following commits fix this issue:
commit de9a6c8d5dbfedb5eb3722c822da0490f6a59a45
PCI/bwctrl: Add pcie_set_target_speed() to set PCIe Link Speed
f68dea13405c94381d08f42dbf0416261622bdad
("PCI: Revert to the original speed after PCIe failed link")
Could you help check whetehr ubuntu need add the fix patch on 24.04 version?
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2100828/+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
