Re: [PATCH v9 4/8] mm,memory_hotplug: Allocate memmap from the added memory range

On Fri 16-04-21 13:24:07, Oscar Salvador wrote: > Physical memory hotadd has to allocate a memmap (struct page array) for > the newly added memory section. Currently, alloc_pages_node() is used > for those allocations. > > This has some disadvantages: > a) an existing memory is consumed for that

[PATCH v9 4/8] mm,memory_hotplug: Allocate memmap from the added memory range

Physical memory hotadd has to allocate a memmap (struct page array) for the newly added memory section. Currently, alloc_pages_node() is used for those allocations. This has some disadvantages: a) an existing memory is consumed for that purpose (eg: ~2MB per 128MB memory section on x86_64)