xnu-1504.9.17.tar.gz

[apple/xnu.git] / osfmk / vm / vm_pageout.h

diff --git a/osfmk/vm/vm_pageout.h b/osfmk/vm/vm_pageout.h
index b76023182feb66b73e7264a732ecd9795d9e76c1..c296ea10db34c7eb840e6b69f29be1d3870d84a4 100644 (file)
--- a/osfmk/vm/vm_pageout.h
+++ b/osfmk/vm/vm_pageout.h
@@ -81,6 +81,11 @@
 
 #include <vm/vm_options.h>
 
+#ifdef MACH_KERNEL_PRIVATE
+#include <vm/vm_page.h>
+#endif
+
+
 extern kern_return_t vm_map_create_upl(
        vm_map_t                map,
        vm_map_address_t        offset,
@@ -96,6 +101,26 @@ extern ppnum_t upl_get_highest_page(
 extern upl_size_t upl_get_size(
        upl_t                   upl);
 
+
+#ifndef        MACH_KERNEL_PRIVATE
+typedef struct vm_page *vm_page_t;
+#endif
+
+
+extern void                vm_page_free_list(
+                            vm_page_t  mem,
+                            boolean_t  prepare_object);
+
+extern kern_return_t      vm_page_alloc_list(
+                            int         page_count,
+                            int                        flags,
+                            vm_page_t * list);
+
+extern void               vm_page_set_offset(vm_page_t page, vm_object_offset_t offset);
+extern vm_object_offset_t vm_page_get_offset(vm_page_t page);
+extern ppnum_t            vm_page_get_phys_page(vm_page_t page);
+extern vm_page_t          vm_page_get_next(vm_page_t page);
+
 #ifdef MACH_KERNEL_PRIVATE
 
 #include <vm/vm_page.h>
@@ -134,6 +159,28 @@ extern uint64_t    vm_zf_count;
 
 #endif /* !(defined(__ppc__)) */
 
+/*
+ * must hold the page queues lock to
+ * manipulate this structure
+ */
+struct vm_pageout_queue {
+        queue_head_t   pgo_pending;    /* laundry pages to be processed by pager's iothread */
+        unsigned int   pgo_laundry;    /* current count of laundry pages on queue or in flight */
+        unsigned int   pgo_maxlaundry;
+
+        unsigned int   pgo_idle:1,     /* iothread is blocked waiting for work to do */
+                       pgo_busy:1,     /* iothread is currently processing request from pgo_pending */
+                       pgo_throttled:1,/* vm_pageout_scan thread needs a wakeup when pgo_laundry drops */
+                       pgo_draining:1,
+                       :0;
+};
+
+#define VM_PAGE_Q_THROTTLED(q)         \
+        ((q)->pgo_laundry >= (q)->pgo_maxlaundry)
+
+extern struct  vm_pageout_queue        vm_pageout_queue_internal;
+extern struct  vm_pageout_queue        vm_pageout_queue_external;
+
 /*
  *     Routines exported to Mach.
  */
@@ -295,10 +342,6 @@ extern kern_return_t vm_map_remove_upl(
 /* wired  page list structure */
 typedef uint32_t *wpl_array_t;
 
-extern void vm_page_free_list(
-       vm_page_t       mem,
-       boolean_t       prepare_object);
-        
 extern void vm_page_free_reserve(int pages);
 
 extern void vm_pageout_throttle_down(vm_page_t page);
@@ -371,7 +414,7 @@ extern kern_return_t mach_vm_pressure_monitor(
 
 extern kern_return_t
 vm_set_buffer_cleanup_callout(
-       boolean_t       (*func)(void));
+       boolean_t       (*func)(int));
 
 struct vm_page_stats_reusable {
        SInt32          reusable_count;
@@ -393,6 +436,8 @@ struct vm_page_stats_reusable {
 };
 extern struct vm_page_stats_reusable vm_page_stats_reusable;
        
+extern int hibernate_flush_memory(void);
+
 #endif /* KERNEL_PRIVATE */
 
 #endif /* _VM_VM_PAGEOUT_H_ */