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Re: 回复: [Xen ARM64] Save coredump log when xen/dom0 crash on ARM64?


On 03/07/2020 07:02, jinchen wrote:
Thank you for your reply!

On 02/07/2020 02:41, jinchen wrote:
 >> Hello xen experts:
 >> Is there any way to save xen and dom0 core dump log when xen or dom0
 >> crash on ARM64 platform?

 >Usually all the crash stack trace (Xen and Dom0) should be output on the
 >Xen Console.

But if I don't connect a debug serial and want to check the dump error after reboot?
If you don't have debug serial always connected, then it will not get the logs.

 >>      I find that the kdump seems can't run on ARM64 platform?

 >We don't have support for kdump/kexec on Arm in Xen yet.

I find the kdump seems the appropriate way to do this, but it doesn't support xen arm64.

 >>      Are there any patches or other way to achive this goal?

 >I am not aware of any patches, but they would be welcomed.

 >For other way, it depends what exactly you expect. Do you need more than
 >the stack trace?

The stack trace will be ok, if other infomantion can be save will be better (like memory/vcpu/domain, etc.)

Kexec is probably the way to go. I would be happy to review the patches for Xen upstream if you are up to provide an implementation.


Julien Grall



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