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...ea_init_node(int nid, unsigned long * zones_size, unsigned long zone_start_pfn, unsigned long *zholes_size); extern void free_initmem(void); +unsigned long max_free_page_blocks(int order); +int get_from_free_page_list(int order, struct list_head *pages, + unsigned int size, unsigned long *loaded_num); /* * Free reserved pages within range [PAGE_ALIGN(start), end & PAGE_MASK) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 1521100..b67839b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5043,6 +5043,104 @@ void show_free_areas(unsigned int filter, nodemask_t *nodemask) sh...

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's