how to generate a smaller core with xm dump-core

[Zhenzhong Duan <zhenzhong.duan@oracle.com>]

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Hi Maintainers,

We are facing issue collecting  coredump using the xm dump mechanism in
Dom0.

We face couple of such issues daily, where the VMs panic s and the SA
team is supposed to collect the core.

The actual problem is that where the VMs are having huge RAM like 32+ GB
RAMs dumping the core using *xm dump* generated core of almost the same
size.

And also when the RAM size is huge the time taken to dump is also huge.

Transferring this core dump of this huge size to another system for
analysis is really a pain. I am looking for some solution where we can
generate smaller core using *xm dump* or any other tool.

Something similar to *makedumpfile* which eliminates the zero and
unnecessary pages, which results in core of smaller size.

This has become a hot issue and we terribly need this feature.

Can you come across with anything or are you aware of any feature which
could cater our need….?

thanks
zduan

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