* Copyright (C) Jiantao Kong, IBM Corp. 2003
* (C) Shailabh Nagar, IBM Corp. 2003
* (C) Chandra Seetharaman, IBM Corp. 2004
- *
- *
- * Memory control functions of the CKRM kernel API
+ *
+ *
+ * Memory control functions of the CKRM kernel API
*
* Latest version, more details at http://ckrm.sf.net
- *
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
*
*/
-/* Changes
- *
- * 28 Aug 2003
- * Created.
- */
-
#ifndef _LINUX_CKRM_MEM_H
#define _LINUX_CKRM_MEM_H
#include <linux/list.h>
#include <linux/ckrm_rc.h>
+#include <linux/kref.h>
+
+struct ckrm_zone {
+ struct list_head active_list;
+ struct list_head inactive_list;
+
+ unsigned long nr_active;
+ unsigned long nr_inactive;
+ unsigned long active_over;
+ unsigned long inactive_over;
+
+ unsigned long shrink_active;
+ unsigned long shrink_inactive;
+ long shrink_weight;
+ unsigned long shrink_flag;
+ struct list_head victim_list; /* list of ckrm_zones chosen for
+ * shrinking. These are over their
+ * 'guarantee'
+ */
+ struct zone *zone;
+ struct ckrm_mem_res *memcls;
+};
+
+struct ckrm_mem_res {
+ unsigned long flags;
+ struct ckrm_core_class *core; /* the core i am part of... */
+ struct ckrm_core_class *parent; /* parent of the core i am part of */
+ struct ckrm_shares shares;
+ struct list_head mcls_list; /* list of all 1-level classes */
+ struct kref nr_users; /* ref count */
+ atomic_t pg_total; /* # of pages used by this class */
+ int pg_guar; /* absolute # of guarantee */
+ int pg_limit; /* absolute # of limit */
+ int pg_borrowed; /* # of pages borrowed from parent */
+ int pg_lent; /* # of pages lent to children */
+ int pg_unused; /* # of pages left to this class
+ * (after giving the guarantees to
+ * children. need to borrow from
+ * parent if more than this is needed.
+ */
+ int hier; /* hiearchy level, root = 0 */
+ int impl_guar; /* for classes with don't care guar */
+ int nr_dontcare; /* # of dont care children */
-typedef struct ckrm_mem_res {
- unsigned long reclaim_flags;
- unsigned long flags;
- struct ckrm_core_class *core; // the core i am part of...
- struct ckrm_core_class *parent; // parent of the core i am part of....
- struct ckrm_shares shares;
- struct list_head mcls_list; // list of all 1-level classes
- struct list_head shrink_list; // list of classes need to be shrunk
- atomic_t nr_users; // # of references to this class/data structure
- atomic_t pg_total; // # of pages used by this class
- int pg_guar; // # of pages this class is guaranteed
- int pg_limit; // max # of pages this class can get
- int pg_borrowed; // # of pages this class borrowed from its parent
- int pg_lent; // # of pages this class lent to its children
- int pg_unused; // # of pages left to this class (after giving the
- // guarantees to children. need to borrow from parent if
- // more than this is needed.
- int nr_active[MAX_NR_ZONES];
- int nr_inactive[MAX_NR_ZONES];
- int tmp_cnt;
+ struct ckrm_zone ckrm_zone[MAX_NR_ZONES];
+
+ struct list_head shrink_list; /* list of classes that are near
+ * limit and need to be shrunk
+ */
int shrink_count;
unsigned long last_shrink;
- int over_limit_failures;
- int hier; // hiearchy, root = 0
-} ckrm_mem_res_t;
+};
+
+#define CLS_SHRINK_BIT (1)
+
+#define CLS_AT_LIMIT (1)
extern atomic_t ckrm_mem_real_count;
-extern unsigned int ckrm_tot_lru_pages;
+extern struct ckrm_res_ctlr mem_rcbs;
+extern struct ckrm_mem_res *ckrm_mem_root_class;
+extern struct list_head ckrm_memclass_list;
extern struct list_head ckrm_shrink_list;
extern spinlock_t ckrm_mem_lock;
-extern struct ckrm_res_ctlr mem_rcbs;
-
-#define page_class(page) ((ckrm_mem_res_t*)((page)->memclass))
-
-// used to fill reclaim_flags, used only when memory is low in the system
-#define CLS_CLEAR (0) // class under its guarantee
-#define CLS_OVER_GUAR (1 << 0) // class is over its guarantee
-#define CLS_PARENT_OVER (1 << 1) // parent is over 110% mark over limit
-#define CLS_OVER_25 (1 << 2) // class over 25% mark bet guar(0) & limit(100)
-#define CLS_OVER_50 (1 << 3) // class over 50% mark bet guar(0) & limit(100)
-#define CLS_OVER_75 (1 << 4) // class over 75% mark bet guar(0) & limit(100)
-#define CLS_OVER_100 (1 << 5) // class over its limit
-#define CLS_OVER_110 (1 << 6) // class over 110% mark over limit
-#define CLS_FLAGS_ALL ( CLS_OVER_GUAR | CLS_PARENT_OVER | CLS_OVER_25 | \
- CLS_OVER_50 | CLS_OVER_75 | CLS_OVER_100 | CLS_OVER_110 )
-#define CLS_SHRINK_BIT (31) // used to both lock and set the bit
-#define CLS_SHRINK (1 << CLS_SHRINK_BIT) // shrink the given class
-
-// used in flags. set when a class is more than 90% of its maxlimit
-#define MEM_AT_LIMIT 1
-
-extern void ckrm_set_aggressive(ckrm_mem_res_t *);
-extern unsigned int ckrm_setup_reclamation(void);
-extern void ckrm_teardown_reclamation(void);
-extern void ckrm_get_reclaim_bits(unsigned int *, unsigned int *);
-extern void ckrm_init_mm_to_task(struct mm_struct *, struct task_struct *);
-extern void ckrm_mem_evaluate_mm(struct mm_struct *);
-extern void ckrm_at_limit(ckrm_mem_res_t *);
-extern int ckrm_memclass_valid(ckrm_mem_res_t *);
-#define ckrm_get_reclaim_flags(cls) ((cls)->reclaim_flags)
+extern int ckrm_nr_mem_classes;
+extern unsigned int ckrm_tot_lru_pages;
+extern int ckrm_mem_shrink_count;
+extern int ckrm_mem_shrink_to;
+extern int ckrm_mem_shrink_interval ;
+extern void ckrm_mem_migrate_mm(struct mm_struct *, struct ckrm_mem_res *);
+extern void ckrm_mem_migrate_all_pages(struct ckrm_mem_res *,
+ struct ckrm_mem_res *);
+extern void memclass_release(struct kref *);
+extern void shrink_get_victims(struct zone *, unsigned long ,
+ unsigned long, struct list_head *);
+extern void ckrm_shrink_atlimit(struct ckrm_mem_res *);
#else
-#define ckrm_init_mm_to_current(a) do {} while (0)
-#define ckrm_mem_evaluate_mm(a) do {} while (0)
-#define ckrm_get_reclaim_flags(a) (0)
-#define ckrm_setup_reclamation() (0)
-#define ckrm_teardown_reclamation() do {} while (0)
-#define ckrm_get_reclaim_bits(a, b) do { *(a) = 0; *(b)= 0; } while (0)
-#define ckrm_init_mm_to_task(a,b) do {} while (0)
-
-#endif // CONFIG_CKRM_RES_MEM
+#define ckrm_mem_migrate_mm(a, b) do {} while (0)
+#define ckrm_mem_migrate_all_pages(a, b) do {} while (0)
-#endif //_LINUX_CKRM_MEM_H
+#endif /* CONFIG_CKRM_RES_MEM */
+#endif /* _LINUX_CKRM_MEM_H */
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