> > So, on the first failure, we even stop trying to populate other
> > sections. No more memory to do so.
>
> This is the thing I worry about. In old sparse_mem_maps_populate_node()
> you can see, when not present or failed to populate, just continue. This
> is the main difference between yours and the old code. The key logic is
> changed here.
>
I do not see how we can succeed after the first failure. We still
allocate from the same node:
sparse_mem_map_populate() may fail only if we could not allocate large
enough buffer vmemmap_buf_start earlier.
This means that in:
sparse_mem_map_populate()
vmemmap_populate()
vmemmap_populate_hugepages()
vmemmap_alloc_block_buf() (no buffer, so call allocator)
vmemmap_alloc_block(size, node);
__earlyonly_bootmem_alloc(node, size, size, __pa(MAX_DMA_ADDRESS));
memblock_virt_alloc_try_nid_raw() -> Nothing changes for
this call to succeed. So, all consequent calls to
sparse_mem_map_populate() in this node will fail as well.
> >
> Forgot mentioning it's the vervion in mm/sparse-vmemmap.c
Sorry, I do not understand what is vervion.
Thank you,
Pavel
