2024-09-09 08:52:07 +00:00
|
|
|
/******************************************************************************
|
|
|
|
|
* 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);
|
|
|
|
|
|
2024-09-09 08:57:42 +00:00
|
|
|
struct page *get_balloon_scratch_page(void);
|
|
|
|
|
void put_balloon_scratch_page(void);
|
|
|
|
|
|
2024-09-09 08:52:07 +00:00
|
|
|
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
|
