ECI kernel panic when enable ftrace utility

[bmh8x]

Hello,

I would like to enable ftrace utility for my Intel ECI 3.0.1 (Distribution: Debian11 (Bullseye) , Linux kernel type: Real-time PREEMPT_RT,  Linux kernel version: 5.10.140-rt73-intel-ese-standard-lts-rt+), but when I execute these following two commands, a kernel panic occurred.

　　# echo 'p:ndprobe d_splice_alias inode=%di' > /sys/kernel/debug/tracing/kprobe_events

　　# echo '1' > /sys/kernel/debug/tracing/events/kprobes/ndprobe/enable

On the other hand, kernel panic do not happen with Debian 11(kernel version: 5.10.0-18-amd64).

So I would like to ask why does a kernel panic occur in ECI? And is there a solution?

Best regards

Bui

[Iffa_Intel]

Hi,

could you check whether your kernel configuration enables the ftrace, as in step 2?

You may refer to this documentation.

Cordially,

Iffa

[bmh8x]

Hello Iffa,

Thank you for your reply!

I have checked my kernel configuration. All kernel parameters required for ftrace in step 2 are enabled.
Please find the attached file for your reference.

Best regards

Bui

[Iffa_Intel]

Hi,

could you:

1. try the same steps on the latest ECI release (3.2)?
2. share the hardware specs for this system.

Cordially,

Iffa

[bmh8x]

Hello Iffa,

Thank you for your advise!

       >1.try the same steps on the latest ECI release (3.2)?

→I will try with  ECI 3.2 and I will let you know the result later.

       >2.share the hardware specs for this system.

→My hardware specs are as follows:

       ・CPU: Intel Atom(R) x6414RE Processor @ 1.50GHz

       ・MEM: 8GB

Please feel free to ask me if you need more information.

Best regards

Bui

[Iffa_Intel]

Hi,

do inform us soon whether the ECI 3.2 release works.

Thanks

Cordially,

Iffa

[bmh8x]

Hello Iffa,

I'm so sorry for the late reply.

I am still preparing for my ECI 3.2 machine. 

I will let you know the result next week.

Best regards

Bui

[Iffa_Intel]

Noted and thanks.

Cordially,

Iffa

[Iffa_Intel]

Hi,

if you don't have any other inquiries, we'll proceed to closing this thread.

Cordially,

Iffa

[Iffa_Intel]

Hi,

Thank you for your question. If you need any additional information from Intel, please submit a new question as Intel is no longer monitoring this thread.

Cordially,

Iffa