On Tue, Mar 18, 2025 at 04:25:23PM +0530, Anshuman Khandual wrote:
>On 3/18/25 12:49, Wei Yang wrote:
>> Commit 61167ad5fecd ("mm: pass nid to reserve_bootmem_region()") introduce
>> a way to set nid to all reserved region.
>>
>> But there is a corner case it will leave some region with invalid nid.
>> When memblock_set_node() doubles the array of memblock.reserved, it may
>> lead to a new reserved region before current position. The new region
>> will be left with an invalid node id.
>
>But is it really possible for the memblock array to double during
>memmap_init_reserved_pages() ? Just wondering - could you please
>give some example scenarios.
>
The possibility is low, but I think it is possible.
I have created a test case to reproduce it. Not sure it could explain ?
