Re: [PATCH v6] PCI: hotplug: Add a generic RAS tracepoint for hotplug event

[Shuai Xue]

在 2025/1/15 09:37, Shuai Xue 写道:
> Hotplug events are critical indicators for analyzing hardware health,
> particularly in AI supercomputers where surprise link downs can
> significantly impact system performance and reliability.
>
> To this end, define a new TRACING_SYSTEM named pci, add a generic RAS
> tracepoint for hotplug event to help healthy check, and generate
> tracepoints for pcie hotplug event. Add enum pci_hotplug_event in
> include/uapi/linux/pci.h so applications like rasdaemon can register
> tracepoint event handlers for it.
>
> The output like below:
>
> $ echo 1 > /sys/kernel/debug/tracing/events/pci/pci_hp_event/enable
> $ cat /sys/kernel/debug/tracing/trace_pipe
>      <...>-206     [001] .....    40.373870: pci_hp_event: 0000:00:02.0 slot:10, event:Link Down
>
>      <...>-206     [001] .....    40.374871: pci_hp_event: 0000:00:02.0 slot:10, event:Card not present
>
> Suggested-by: Lukas Wunner <lukas@xxxxxxxxx>
> Suggested-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Signed-off-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>
> Reviewed-by: Lukas Wunner <lukas@xxxxxxxxx>
> ---
> changes since v5:
> - move define of enum to include/uapi/linux/pci.h

Hi, Bjorn,

As this patch missed v6.13, should I rebase on pci/main (v6.14-rc1)?

Thanks.
Shuai