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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[karo-tx-linux.git] / include / xen / balloon.h
1 /******************************************************************************
2  * Xen balloon functionality
3  */
4
5 #define RETRY_UNLIMITED 0
6
7 struct balloon_stats {
8         /* We aim for 'current allocation' == 'target allocation'. */
9         unsigned long current_pages;
10         unsigned long target_pages;
11         unsigned long target_unpopulated;
12         /* Number of pages in high- and low-memory balloons. */
13         unsigned long balloon_low;
14         unsigned long balloon_high;
15         unsigned long total_pages;
16         unsigned long schedule_delay;
17         unsigned long max_schedule_delay;
18         unsigned long retry_count;
19         unsigned long max_retry_count;
20 };
21
22 extern struct balloon_stats balloon_stats;
23
24 void balloon_set_new_target(unsigned long target);
25
26 int alloc_xenballooned_pages(int nr_pages, struct page **pages);
27 void free_xenballooned_pages(int nr_pages, struct page **pages);
28
29 struct device;
30 #ifdef CONFIG_XEN_SELFBALLOONING
31 extern int register_xen_selfballooning(struct device *dev);
32 #else
33 static inline int register_xen_selfballooning(struct device *dev)
34 {
35         return -ENOSYS;
36 }
37 #endif