* 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; // # of pages in the active list
- unsigned long nr_inactive; // # of pages in the inactive list
- 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
- 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....
+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
- struct kref 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 impl_guar; // implicit guarantee for class with don't care guar
- int nr_dontcare; // # of children with don't care guarantee
- struct ckrm_zone ckrm_zone[MAX_NR_ZONES];
+ 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;
int shrink_count;
unsigned long last_shrink;
int over_limit_failures;
- int shrink_pages; // # of pages to free in this class
- int hier; // hiearchy, root = 0
-};
+ int hier; // hiearchy, root = 0
+} ckrm_mem_res_t;
extern atomic_t ckrm_mem_real_count;
extern unsigned int ckrm_tot_lru_pages;
-extern int ckrm_nr_mem_classes;
extern struct list_head ckrm_shrink_list;
-extern struct list_head ckrm_memclass_list;
extern spinlock_t ckrm_mem_lock;
extern struct ckrm_res_ctlr mem_rcbs;
-extern struct ckrm_mem_res *ckrm_mem_root_class;
-
-#define page_ckrmzone(page) ((page)->ckrm_zone)
-#define CLS_SHRINK_BIT (1)
+#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
+#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 *, struct ckrm_mem_res *);
-extern void ckrm_at_limit(struct ckrm_mem_res *);
-extern int ckrm_memclass_valid(struct ckrm_mem_res *);
-extern int ckrm_mem_get_shrink_to(void);
-extern void check_memclass(struct ckrm_mem_res *, char *);
-extern void memclass_release(struct kref *);
+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)
#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
#endif //_LINUX_CKRM_MEM_H
+
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