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

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Message-ID: <fc8788ca-ffef-4166-a8d0-4c5748003de2@linux.alibaba.com>
Date: Mon, 24 Feb 2025 11:38:37 +0800
From: Shuai Xue <xueshuai@...ux.alibaba.com>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: bhelgaas@...gle.com, tony.luck@...el.com, bp@...en8.de,
 mhiramat@...nel.org, mathieu.desnoyers@...icios.com, oleg@...hat.com,
 naveen@...nel.org, davem@...emloft.net, anil.s.keshavamurthy@...el.com,
 mark.rutland@....com, peterz@...radead.org, tianruidong@...ux.alibaba.com,
 rostedt@...dmis.org, lukas@...ner.de, linux-pci@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH v6] PCI: hotplug: Add a generic RAS tracepoint for hotplug
 event



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@...ner.de>
> Suggested-by: Steven Rostedt <rostedt@...dmis.org>
> Signed-off-by: Shuai Xue <xueshuai@...ux.alibaba.com>
> Reviewed-by: Lukas Wunner <lukas@...ner.de>
> ---
> 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