On 21.08.25 22:32, David Hildenbrand wrote:
On 21.08.25 22:06, David Hildenbrand wrote:
We want to get rid of nth_page(), and kfence init code is the last user.
Unfortunately, we might actually walk a PFN range where the pages are not contiguous, because we might be allocating an area from memblock that could span memory sections in problematic kernel configs (SPARSEMEM without SPARSEMEM_VMEMMAP).
We could check whether the page range is contiguous using page_range_contiguous() and failing kfence init, or making kfence incompatible these problemtic kernel configs.
Let's keep it simple and simply use pfn_to_page() by iterating PFNs.
Fortunately this series is RFC due to lack of detailed testing :P
Something gives me a NULL-pointer pointer here (maybe the virt_to_phys()).
Will look into that tomorrow.
Okay, easy: relying on i but not updating it /me facepalm