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- /******************************************************************************
- * Xen balloon functionality
- */
- #define RETRY_UNLIMITED 0
- struct balloon_stats {
- /* We aim for 'current allocation' == 'target allocation'. */
- unsigned long current_pages;
- unsigned long target_pages;
- /* Number of pages in high- and low-memory balloons. */
- unsigned long balloon_low;
- unsigned long balloon_high;
- unsigned long schedule_delay;
- unsigned long max_schedule_delay;
- unsigned long retry_count;
- unsigned long max_retry_count;
- #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
- unsigned long hotplug_pages;
- unsigned long balloon_hotplug;
- #endif
- };
- extern struct balloon_stats balloon_stats;
- void balloon_set_new_target(unsigned long target);
- int alloc_xenballooned_pages(int nr_pages, struct page **pages,
- bool highmem);
- void free_xenballooned_pages(int nr_pages, struct page **pages);
- struct page *get_balloon_scratch_page(void);
- void put_balloon_scratch_page(void);
- struct device;
- #ifdef CONFIG_XEN_SELFBALLOONING
- extern int register_xen_selfballooning(struct device *dev);
- #else
- static inline int register_xen_selfballooning(struct device *dev)
- {
- return -ENOSYS;
- }
- #endif
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