Re: [PATCH v5 0/5] kdump: crashkernel reservation from CMA

David Hildenbrand
2025-10-06T08:16:39Z

On 03.10.25 17:51, Breno Leitao wrote:
> Hello Jiri,
>
> On Thu, Jun 12, 2025 at 12:11:19PM +0200, Jiri Bohac wrote:
>
>> Currently this is only the case for memory ballooning and zswap. Such movable
>> memory will be missing from the vmcore. User data is typically not dumped by
>> makedumpfile.
>
> For zswap and zsmalloc pages, I'm wondering whether these pages will be missing
> from the vmcore, or if there's a possibility they might be present but
> corrupted—especially since they could reside in the CMA region, which may be
> overwritten by the kdump environment.

That's not different to ordinary user pages residing on these areas, right?

--
Cheers

David / dhildenb