Re: [PATCH 0/4] Export offsets of VMCS fields as note informationfor kdump

From: zhangyanfei
Date: Wed Apr 18 2012 - 05:50:22 EST

ä 2012å04æ18æ 16:24, Avi Kivity åé:
> On 04/18/2012 10:30 AM, zhangyanfei wrote:
>>> Okay. Do you expect it to help in debugging the crash? Did you have
>>> cases where it would help?
>> Yes, I do expect it to help in debugging the crash.
>> Looking into host machine's crash dump, if we figure out the fact that the crash
>> had happend when some host's resource was requested and used by some guset machine.
>> Then, we surely want to look into the situation from guest machine's view.
> What type of resource? Can you give an example?
Sorry. No concrete example for now.

We are developing this on a conservative policy and I have put the vmcs processing
in a new module in patch set v2 as you required. The new module is auto-loaded when
the vmx cpufeature is detected and it depends on module kvm-intel. Loading and unloading
this module will have no side effect on the running guests.

And one thing I have to stress is that, we can see guest image as crash dump from
guest machine's view if we have the vmcsinfo, this itself is useful.

Zhang Yanfei

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at