2011-03-14 23:29:37 +08:00
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/******************************************************************************
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* Xen balloon functionality
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*/
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#define RETRY_UNLIMITED 0
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struct balloon_stats {
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/* We aim for 'current allocation' == 'target allocation'. */
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unsigned long current_pages;
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unsigned long target_pages;
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/* Number of pages in high- and low-memory balloons. */
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unsigned long balloon_low;
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unsigned long balloon_high;
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unsigned long schedule_delay;
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unsigned long max_schedule_delay;
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unsigned long retry_count;
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unsigned long max_retry_count;
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2011-07-26 08:12:06 +08:00
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#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
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unsigned long hotplug_pages;
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unsigned long balloon_hotplug;
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#endif
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2011-03-14 23:29:37 +08:00
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};
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extern struct balloon_stats balloon_stats;
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void balloon_set_new_target(unsigned long target);
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2011-03-15 22:23:57 +08:00
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2011-09-29 18:57:55 +08:00
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int alloc_xenballooned_pages(int nr_pages, struct page **pages,
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bool highmem);
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void free_xenballooned_pages(int nr_pages, struct page **pages);
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2011-07-09 02:26:21 +08:00
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struct sys_device;
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#ifdef CONFIG_XEN_SELFBALLOONING
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extern int register_xen_selfballooning(struct sys_device *sysdev);
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#else
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static inline int register_xen_selfballooning(struct sys_device *sysdev)
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{
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return -ENOSYS;
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}
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#endif
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