Re: how to return a chunk of kernel .data to free mem ?

[David Hildenbrand]

On 05.06.21 16:50, jim.cromie@xxxxxxxxx wrote:
> I have convinced DYNAMIC_DEBUG code to not need
> about 15% of its __dyndbg section, about 30kb on my test kernel.
>
> This memory is not kmalloc'd, so krealloc wont work.
> (I tried anyway, on a loaded module, it panicd)
>
> Is there a way to return a chunk of init .data memory to general use ?
>
> heres the patchset;
> https://lore.kernel.org/lkml/20210529200029.205306-1-jim.cromie@xxxxxxxxx/

Hm, you could try free_reserved_page(). But obviously, only full pages 
can be handed to the buddy.

--
Thanks,

David / dhildenb