[PATCH 0/4] Export offsets of VMCS fields as note information for kdump

zhangyanfei zhangyanfei at cn.fujitsu.com
Wed Apr 18 05:49:49 EDT 2012

于 2012年04月18日 16:24, Avi Kivity 写道:
> 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

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