Linux 3.15-rc1
[linux/fpc-iii.git] / include / xen / balloon.h
bloba4c1c6a93691a76ce5299c00b48564bd55912d24
1 /******************************************************************************
2 * Xen balloon functionality
3 */
5 #define RETRY_UNLIMITED 0
7 struct balloon_stats {
8 /* We aim for 'current allocation' == 'target allocation'. */
9 unsigned long current_pages;
10 unsigned long target_pages;
11 /* Number of pages in high- and low-memory balloons. */
12 unsigned long balloon_low;
13 unsigned long balloon_high;
14 unsigned long schedule_delay;
15 unsigned long max_schedule_delay;
16 unsigned long retry_count;
17 unsigned long max_retry_count;
18 #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
19 unsigned long hotplug_pages;
20 unsigned long balloon_hotplug;
21 #endif
24 extern struct balloon_stats balloon_stats;
26 void balloon_set_new_target(unsigned long target);
28 int alloc_xenballooned_pages(int nr_pages, struct page **pages,
29 bool highmem);
30 void free_xenballooned_pages(int nr_pages, struct page **pages);
32 struct page *get_balloon_scratch_page(void);
33 void put_balloon_scratch_page(void);
35 struct device;
36 #ifdef CONFIG_XEN_SELFBALLOONING
37 extern int register_xen_selfballooning(struct device *dev);
38 #else
39 static inline int register_xen_selfballooning(struct device *dev)
41 return -ENOSYS;
43 #endif