On Tue, Sep 05, 2023 at 06:35:08PM +0800, Kefeng Wang wrote: > It is needed 4095 pages(1G) or 7 pages(2M) to be allocated once in > alloc_vmemmap_page_list(), so let's add a bulk allocator varietas > alloc_pages_bulk_list_node() and switch alloc_vmemmap_page_list() > to use it to accelerate page allocation. Argh, no, please don't do this. Iterating a linked list is _expensive_. It is about 10x quicker to iterate an array than a linked list. Adding the list_head option to __alloc_pages_bulk() was a colossal mistake. Don't perpetuate it. These pages are going into an array anyway. Don't put them on a list first.
