linux-kernel - Re: [PATCH v9 0/2] add PCI hotplug and PCIe link tracepoint

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Message-ID: <ad68796a-8bb6-4f4a-9d30-80e7ffa4ded4@linux.alibaba.com>
Date: Fri, 19 Sep 2025 09:40:26 +0800
From: Shuai Xue <xueshuai@...ux.alibaba.com>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: 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, ilpo.jarvinen@...ux.intel.com,
 mattc@...estorage.com, Jonathan.Cameron@...wei.com, 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
Subject: Re: [PATCH v9 0/2] add PCI hotplug and PCIe link tracepoint



在 2025/9/19 07:06, Bjorn Helgaas 写道:
> On Wed, Jul 23, 2025 at 11:31:06AM +0800, Shuai Xue wrote:
>> changes since v8:
>> - rewrite commit log from Bjorn
>> - move pci_hp_event to a common place (include/trace/events/pci.h) per Ilpo
>> - rename hotplug event strings per Bjorn and Lukas
>> - add PCIe link tracepoint per Bjorn, Lukas, and Ilpo
>>
>> Hotplug events are critical indicators for analyzing hardware health, and
>> surprise link downs can significantly impact system performance and reliability.
>> In addition, PCIe link speed degradation directly impacts system performance and
>> often indicates hardware issues such as faulty devices, physical layer problems,
>> or configuration errors.
>>
>> This patch set add PCI hotplug and PCIe link tracepoint to help analyze PCI
>> hotplug events and PCIe link speed degradation.
>>
>> Shuai Xue (2):
>>    PCI: trace: Add a generic RAS tracepoint for hotplug event
>>    PCI: trace: Add a RAS tracepoint to monitor link speed changes
>>
>>   drivers/pci/hotplug/pciehp_ctrl.c |  33 +++++++--
>>   drivers/pci/hotplug/pciehp_hpc.c  |   5 +-
>>   drivers/pci/pci.c                 |   2 +-
>>   drivers/pci/pci.h                 |  12 ++-
>>   drivers/pci/pcie/bwctrl.c         |   4 +-
>>   drivers/pci/probe.c               |  10 ++-
>>   include/linux/pci.h               |   1 +
>>   include/trace/events/pci.h        | 119 ++++++++++++++++++++++++++++++
>>   include/uapi/linux/pci.h          |   7 ++
>>   9 files changed, 177 insertions(+), 16 deletions(-)
>>   create mode 100644 include/trace/events/pci.h
> 
> Hi Shuai,
> 
> I lost track of what happened with this series.  It seemed like we
> were pretty close but there were some trivial issues, and I don't
> think we ever merged it.  Did I miss something, or are you waiting on
> me?
> 
> Bjorn

Hi Bjorn,

Thank you for following up on this series. I apologize for the lack of
updates.

You're right that we were close to merging - I've been tied up with
other urgent work and haven't had a chance to address the remaining
minor issues.

I'll prepare and send out a new version this week with all the requested
changes.

Thanks for your patience.

Best regards,
Shuai