]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - include/xen/balloon.h
Merge tag 'md/3.12' of git://neil.brown.name/md
[mirror_ubuntu-bionic-kernel.git] / include / xen / balloon.h
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1/******************************************************************************
2 * Xen balloon functionality
3 */
4
5#define RETRY_UNLIMITED 0
6
7struct 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;
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18#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
19 unsigned long hotplug_pages;
20 unsigned long balloon_hotplug;
21#endif
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22};
23
24extern struct balloon_stats balloon_stats;
25
26void balloon_set_new_target(unsigned long target);
b6f30679 27
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28int alloc_xenballooned_pages(int nr_pages, struct page **pages,
29 bool highmem);
30void free_xenballooned_pages(int nr_pages, struct page **pages);
a50777c7 31
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32struct page *get_balloon_scratch_page(void);
33void put_balloon_scratch_page(void);
34
07068021 35struct device;
a50777c7 36#ifdef CONFIG_XEN_SELFBALLOONING
07068021 37extern int register_xen_selfballooning(struct device *dev);
a50777c7 38#else
07068021 39static inline int register_xen_selfballooning(struct device *dev)
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40{
41 return -ENOSYS;
42}
43#endif