红帽全球峰会17.4. Supported kdump filtering levels
To reduce the size of the dump file, kdump uses the makedumpfile core collector to compress the data and also exclude unwanted information, for example, you can remove hugepages and hugetlbfs pages by using the -8 level. The levels that makedumpfile currently supports can be seen in the table for Filtering levels for `kdump` .
| Option | Description |
|---|---|
|
| Zero pages |
|
| Cache pages |
|
| Cache private |
|
| User pages |
|
| Free pages |
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