1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Author: SeongJae Park <sjpark@amazon.de>
11 #include <linux/memcontrol.h>
12 #include <linux/mutex.h>
13 #include <linux/time64.h>
14 #include <linux/types.h>
15 #include <linux/random.h>
17 /* Minimal region size. Every damon_region is aligned by this. */
18 #define DAMON_MIN_REGION PAGE_SIZE
19 /* Max priority score for DAMON-based operation schemes */
20 #define DAMOS_MAX_SCORE (99)
22 /* Get a random number in [l, r) */
23 static inline unsigned long damon_rand(unsigned long l, unsigned long r)
25 return l + get_random_u32_below(r - l);
29 * struct damon_addr_range - Represents an address region of [@start, @end).
30 * @start: Start address of the region (inclusive).
31 * @end: End address of the region (exclusive).
33 struct damon_addr_range {
39 * struct damon_region - Represents a monitoring target region.
40 * @ar: The address range of the region.
41 * @sampling_addr: Address of the sample for the next access check.
42 * @nr_accesses: Access frequency of this region.
43 * @list: List head for siblings.
44 * @age: Age of this region.
46 * @nr_accesses is reset to zero for every &damon_attrs->aggr_interval and be
47 * increased for every &damon_attrs->sample_interval if an access to the region
48 * during the last sampling interval is found. The update of this field should
49 * not be done with direct access but with the helper function,
50 * damon_update_region_access_rate().
52 * @age is initially zero, increased for each aggregation interval, and reset
53 * to zero again if the access frequency is significantly changed. If two
54 * regions are merged into a new region, both @nr_accesses and @age of the new
55 * region are set as region size-weighted average of those of the two regions.
58 struct damon_addr_range ar;
59 unsigned long sampling_addr;
60 unsigned int nr_accesses;
61 struct list_head list;
64 /* private: Internal value for age calculation. */
65 unsigned int last_nr_accesses;
69 * struct damon_target - Represents a monitoring target.
70 * @pid: The PID of the virtual address space to monitor.
71 * @nr_regions: Number of monitoring target regions of this target.
72 * @regions_list: Head of the monitoring target regions of this target.
73 * @list: List head for siblings.
75 * Each monitoring context could have multiple targets. For example, a context
76 * for virtual memory address spaces could have multiple target processes. The
77 * @pid should be set for appropriate &struct damon_operations including the
78 * virtual address spaces monitoring operations.
82 unsigned int nr_regions;
83 struct list_head regions_list;
84 struct list_head list;
88 * enum damos_action - Represents an action of a Data Access Monitoring-based
91 * @DAMOS_WILLNEED: Call ``madvise()`` for the region with MADV_WILLNEED.
92 * @DAMOS_COLD: Call ``madvise()`` for the region with MADV_COLD.
93 * @DAMOS_PAGEOUT: Call ``madvise()`` for the region with MADV_PAGEOUT.
94 * @DAMOS_HUGEPAGE: Call ``madvise()`` for the region with MADV_HUGEPAGE.
95 * @DAMOS_NOHUGEPAGE: Call ``madvise()`` for the region with MADV_NOHUGEPAGE.
96 * @DAMOS_LRU_PRIO: Prioritize the region on its LRU lists.
97 * @DAMOS_LRU_DEPRIO: Deprioritize the region on its LRU lists.
98 * @DAMOS_STAT: Do nothing but count the stat.
99 * @NR_DAMOS_ACTIONS: Total number of DAMOS actions
101 * The support of each action is up to running &struct damon_operations.
102 * &enum DAMON_OPS_VADDR and &enum DAMON_OPS_FVADDR supports all actions except
103 * &enum DAMOS_LRU_PRIO and &enum DAMOS_LRU_DEPRIO. &enum DAMON_OPS_PADDR
104 * supports only &enum DAMOS_PAGEOUT, &enum DAMOS_LRU_PRIO, &enum
105 * DAMOS_LRU_DEPRIO, and &DAMOS_STAT.
115 DAMOS_STAT, /* Do nothing but only record the stat */
120 * struct damos_quota - Controls the aggressiveness of the given scheme.
121 * @ms: Maximum milliseconds that the scheme can use.
122 * @sz: Maximum bytes of memory that the action can be applied.
123 * @reset_interval: Charge reset interval in milliseconds.
125 * @weight_sz: Weight of the region's size for prioritization.
126 * @weight_nr_accesses: Weight of the region's nr_accesses for prioritization.
127 * @weight_age: Weight of the region's age for prioritization.
129 * To avoid consuming too much CPU time or IO resources for applying the
130 * &struct damos->action to large memory, DAMON allows users to set time and/or
131 * size quotas. The quotas can be set by writing non-zero values to &ms and
132 * &sz, respectively. If the time quota is set, DAMON tries to use only up to
133 * &ms milliseconds within &reset_interval for applying the action. If the
134 * size quota is set, DAMON tries to apply the action only up to &sz bytes
135 * within &reset_interval.
137 * Internally, the time quota is transformed to a size quota using estimated
138 * throughput of the scheme's action. DAMON then compares it against &sz and
139 * uses smaller one as the effective quota.
141 * For selecting regions within the quota, DAMON prioritizes current scheme's
142 * target memory regions using the &struct damon_operations->get_scheme_score.
143 * You could customize the prioritization logic by setting &weight_sz,
144 * &weight_nr_accesses, and &weight_age, because monitoring operations are
145 * encouraged to respect those.
150 unsigned long reset_interval;
152 unsigned int weight_sz;
153 unsigned int weight_nr_accesses;
154 unsigned int weight_age;
157 /* For throughput estimation */
158 unsigned long total_charged_sz;
159 unsigned long total_charged_ns;
161 unsigned long esz; /* Effective size quota in bytes */
163 /* For charging the quota */
164 unsigned long charged_sz;
165 unsigned long charged_from;
166 struct damon_target *charge_target_from;
167 unsigned long charge_addr_from;
169 /* For prioritization */
170 unsigned long histogram[DAMOS_MAX_SCORE + 1];
171 unsigned int min_score;
175 * enum damos_wmark_metric - Represents the watermark metric.
177 * @DAMOS_WMARK_NONE: Ignore the watermarks of the given scheme.
178 * @DAMOS_WMARK_FREE_MEM_RATE: Free memory rate of the system in [0,1000].
179 * @NR_DAMOS_WMARK_METRICS: Total number of DAMOS watermark metrics
181 enum damos_wmark_metric {
183 DAMOS_WMARK_FREE_MEM_RATE,
184 NR_DAMOS_WMARK_METRICS,
188 * struct damos_watermarks - Controls when a given scheme should be activated.
189 * @metric: Metric for the watermarks.
190 * @interval: Watermarks check time interval in microseconds.
191 * @high: High watermark.
192 * @mid: Middle watermark.
193 * @low: Low watermark.
195 * If &metric is &DAMOS_WMARK_NONE, the scheme is always active. Being active
196 * means DAMON does monitoring and applying the action of the scheme to
197 * appropriate memory regions. Else, DAMON checks &metric of the system for at
198 * least every &interval microseconds and works as below.
200 * If &metric is higher than &high, the scheme is inactivated. If &metric is
201 * between &mid and &low, the scheme is activated. If &metric is lower than
202 * &low, the scheme is inactivated.
204 struct damos_watermarks {
205 enum damos_wmark_metric metric;
206 unsigned long interval;
216 * struct damos_stat - Statistics on a given scheme.
217 * @nr_tried: Total number of regions that the scheme is tried to be applied.
218 * @sz_tried: Total size of regions that the scheme is tried to be applied.
219 * @nr_applied: Total number of regions that the scheme is applied.
220 * @sz_applied: Total size of regions that the scheme is applied.
221 * @qt_exceeds: Total number of times the quota of the scheme has exceeded.
224 unsigned long nr_tried;
225 unsigned long sz_tried;
226 unsigned long nr_applied;
227 unsigned long sz_applied;
228 unsigned long qt_exceeds;
232 * enum damos_filter_type - Type of memory for &struct damos_filter
233 * @DAMOS_FILTER_TYPE_ANON: Anonymous pages.
234 * @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages.
235 * @DAMOS_FILTER_TYPE_ADDR: Address range.
236 * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target.
237 * @NR_DAMOS_FILTER_TYPES: Number of filter types.
239 * The anon pages type and memcg type filters are handled by underlying
240 * &struct damon_operations as a part of scheme action trying, and therefore
241 * accounted as 'tried'. In contrast, other types are handled by core layer
242 * before trying of the action and therefore not accounted as 'tried'.
244 * The support of the filters that handled by &struct damon_operations depend
245 * on the running &struct damon_operations.
246 * &enum DAMON_OPS_PADDR supports both anon pages type and memcg type filters,
247 * while &enum DAMON_OPS_VADDR and &enum DAMON_OPS_FVADDR don't support any of
250 enum damos_filter_type {
251 DAMOS_FILTER_TYPE_ANON,
252 DAMOS_FILTER_TYPE_MEMCG,
253 DAMOS_FILTER_TYPE_ADDR,
254 DAMOS_FILTER_TYPE_TARGET,
255 NR_DAMOS_FILTER_TYPES,
259 * struct damos_filter - DAMOS action target memory filter.
260 * @type: Type of the page.
261 * @matching: If the matching page should filtered out or in.
262 * @memcg_id: Memcg id of the question if @type is DAMOS_FILTER_MEMCG.
263 * @addr_range: Address range if @type is DAMOS_FILTER_TYPE_ADDR.
264 * @target_idx: Index of the &struct damon_target of
265 * &damon_ctx->adaptive_targets if @type is
266 * DAMOS_FILTER_TYPE_TARGET.
267 * @list: List head for siblings.
269 * Before applying the &damos->action to a memory region, DAMOS checks if each
270 * page of the region matches to this and avoid applying the action if so.
271 * Support of each filter type depends on the running &struct damon_operations
272 * and the type. Refer to &enum damos_filter_type for more detai.
274 struct damos_filter {
275 enum damos_filter_type type;
278 unsigned short memcg_id;
279 struct damon_addr_range addr_range;
282 struct list_head list;
286 * struct damos_access_pattern - Target access pattern of the given scheme.
287 * @min_sz_region: Minimum size of target regions.
288 * @max_sz_region: Maximum size of target regions.
289 * @min_nr_accesses: Minimum ``->nr_accesses`` of target regions.
290 * @max_nr_accesses: Maximum ``->nr_accesses`` of target regions.
291 * @min_age_region: Minimum age of target regions.
292 * @max_age_region: Maximum age of target regions.
294 struct damos_access_pattern {
295 unsigned long min_sz_region;
296 unsigned long max_sz_region;
297 unsigned int min_nr_accesses;
298 unsigned int max_nr_accesses;
299 unsigned int min_age_region;
300 unsigned int max_age_region;
304 * struct damos - Represents a Data Access Monitoring-based Operation Scheme.
305 * @pattern: Access pattern of target regions.
306 * @action: &damo_action to be applied to the target regions.
307 * @quota: Control the aggressiveness of this scheme.
308 * @wmarks: Watermarks for automated (in)activation of this scheme.
309 * @filters: Additional set of &struct damos_filter for &action.
310 * @stat: Statistics of this scheme.
311 * @list: List head for siblings.
313 * For each aggregation interval, DAMON finds regions which fit in the
314 * &pattern and applies &action to those. To avoid consuming too much
315 * CPU time or IO resources for the &action, "a is used.
317 * To do the work only when needed, schemes can be activated for specific
318 * system situations using &wmarks. If all schemes that registered to the
319 * monitoring context are inactive, DAMON stops monitoring either, and just
320 * repeatedly checks the watermarks.
322 * Before applying the &action to a memory region, &struct damon_operations
323 * implementation could check pages of the region and skip &action to respect
326 * After applying the &action to each region, &stat_count and &stat_sz is
327 * updated to reflect the number of regions and total size of regions that the
328 * &action is applied.
331 struct damos_access_pattern pattern;
332 enum damos_action action;
333 struct damos_quota quota;
334 struct damos_watermarks wmarks;
335 struct list_head filters;
336 struct damos_stat stat;
337 struct list_head list;
341 * enum damon_ops_id - Identifier for each monitoring operations implementation
343 * @DAMON_OPS_VADDR: Monitoring operations for virtual address spaces
344 * @DAMON_OPS_FVADDR: Monitoring operations for only fixed ranges of virtual
346 * @DAMON_OPS_PADDR: Monitoring operations for the physical address space
347 * @NR_DAMON_OPS: Number of monitoring operations implementations
359 * struct damon_operations - Monitoring operations for given use cases.
361 * @id: Identifier of this operations set.
362 * @init: Initialize operations-related data structures.
363 * @update: Update operations-related data structures.
364 * @prepare_access_checks: Prepare next access check of target regions.
365 * @check_accesses: Check the accesses to target regions.
366 * @reset_aggregated: Reset aggregated accesses monitoring results.
367 * @get_scheme_score: Get the score of a region for a scheme.
368 * @apply_scheme: Apply a DAMON-based operation scheme.
369 * @target_valid: Determine if the target is valid.
370 * @cleanup: Clean up the context.
372 * DAMON can be extended for various address spaces and usages. For this,
373 * users should register the low level operations for their target address
374 * space and usecase via the &damon_ctx.ops. Then, the monitoring thread
375 * (&damon_ctx.kdamond) calls @init and @prepare_access_checks before starting
376 * the monitoring, @update after each &damon_attrs.ops_update_interval, and
377 * @check_accesses, @target_valid and @prepare_access_checks after each
378 * &damon_attrs.sample_interval. Finally, @reset_aggregated is called after
379 * each &damon_attrs.aggr_interval.
381 * Each &struct damon_operations instance having valid @id can be registered
382 * via damon_register_ops() and selected by damon_select_ops() later.
383 * @init should initialize operations-related data structures. For example,
384 * this could be used to construct proper monitoring target regions and link
385 * those to @damon_ctx.adaptive_targets.
386 * @update should update the operations-related data structures. For example,
387 * this could be used to update monitoring target regions for current status.
388 * @prepare_access_checks should manipulate the monitoring regions to be
389 * prepared for the next access check.
390 * @check_accesses should check the accesses to each region that made after the
391 * last preparation and update the number of observed accesses of each region.
392 * It should also return max number of observed accesses that made as a result
393 * of its update. The value will be used for regions adjustment threshold.
394 * @reset_aggregated should reset the access monitoring results that aggregated
395 * by @check_accesses.
396 * @get_scheme_score should return the priority score of a region for a scheme
397 * as an integer in [0, &DAMOS_MAX_SCORE].
398 * @apply_scheme is called from @kdamond when a region for user provided
399 * DAMON-based operation scheme is found. It should apply the scheme's action
400 * to the region and return bytes of the region that the action is successfully
402 * @target_valid should check whether the target is still valid for the
404 * @cleanup is called from @kdamond just before its termination.
406 struct damon_operations {
407 enum damon_ops_id id;
408 void (*init)(struct damon_ctx *context);
409 void (*update)(struct damon_ctx *context);
410 void (*prepare_access_checks)(struct damon_ctx *context);
411 unsigned int (*check_accesses)(struct damon_ctx *context);
412 void (*reset_aggregated)(struct damon_ctx *context);
413 int (*get_scheme_score)(struct damon_ctx *context,
414 struct damon_target *t, struct damon_region *r,
415 struct damos *scheme);
416 unsigned long (*apply_scheme)(struct damon_ctx *context,
417 struct damon_target *t, struct damon_region *r,
418 struct damos *scheme);
419 bool (*target_valid)(struct damon_target *t);
420 void (*cleanup)(struct damon_ctx *context);
424 * struct damon_callback - Monitoring events notification callbacks.
426 * @before_start: Called before starting the monitoring.
427 * @after_wmarks_check: Called after each schemes' watermarks check.
428 * @after_sampling: Called after each sampling.
429 * @after_aggregation: Called after each aggregation.
430 * @before_damos_apply: Called before applying DAMOS action.
431 * @before_terminate: Called before terminating the monitoring.
432 * @private: User private data.
434 * The monitoring thread (&damon_ctx.kdamond) calls @before_start and
435 * @before_terminate just before starting and finishing the monitoring,
436 * respectively. Therefore, those are good places for installing and cleaning
439 * The monitoring thread calls @after_wmarks_check after each DAMON-based
440 * operation schemes' watermarks check. If users need to make changes to the
441 * attributes of the monitoring context while it's deactivated due to the
442 * watermarks, this is the good place to do.
444 * The monitoring thread calls @after_sampling and @after_aggregation for each
445 * of the sampling intervals and aggregation intervals, respectively.
446 * Therefore, users can safely access the monitoring results without additional
447 * protection. For the reason, users are recommended to use these callback for
448 * the accesses to the results.
450 * If any callback returns non-zero, monitoring stops.
452 struct damon_callback {
455 int (*before_start)(struct damon_ctx *context);
456 int (*after_wmarks_check)(struct damon_ctx *context);
457 int (*after_sampling)(struct damon_ctx *context);
458 int (*after_aggregation)(struct damon_ctx *context);
459 int (*before_damos_apply)(struct damon_ctx *context,
460 struct damon_target *target,
461 struct damon_region *region,
462 struct damos *scheme);
463 void (*before_terminate)(struct damon_ctx *context);
467 * struct damon_attrs - Monitoring attributes for accuracy/overhead control.
469 * @sample_interval: The time between access samplings.
470 * @aggr_interval: The time between monitor results aggregations.
471 * @ops_update_interval: The time between monitoring operations updates.
472 * @min_nr_regions: The minimum number of adaptive monitoring
474 * @max_nr_regions: The maximum number of adaptive monitoring
477 * For each @sample_interval, DAMON checks whether each region is accessed or
478 * not during the last @sample_interval. If such access is found, DAMON
479 * aggregates the information by increasing &damon_region->nr_accesses for
480 * @aggr_interval time. For each @aggr_interval, the count is reset. DAMON
481 * also checks whether the target memory regions need update (e.g., by
482 * ``mmap()`` calls from the application, in case of virtual memory monitoring)
483 * and applies the changes for each @ops_update_interval. All time intervals
484 * are in micro-seconds. Please refer to &struct damon_operations and &struct
485 * damon_callback for more detail.
488 unsigned long sample_interval;
489 unsigned long aggr_interval;
490 unsigned long ops_update_interval;
491 unsigned long min_nr_regions;
492 unsigned long max_nr_regions;
496 * struct damon_ctx - Represents a context for each monitoring. This is the
497 * main interface that allows users to set the attributes and get the results
500 * @attrs: Monitoring attributes for accuracy/overhead control.
501 * @kdamond: Kernel thread who does the monitoring.
502 * @kdamond_lock: Mutex for the synchronizations with @kdamond.
504 * For each monitoring context, one kernel thread for the monitoring is
505 * created. The pointer to the thread is stored in @kdamond.
507 * Once started, the monitoring thread runs until explicitly required to be
508 * terminated or every monitoring target is invalid. The validity of the
509 * targets is checked via the &damon_operations.target_valid of @ops. The
510 * termination can also be explicitly requested by calling damon_stop().
511 * The thread sets @kdamond to NULL when it terminates. Therefore, users can
512 * know whether the monitoring is ongoing or terminated by reading @kdamond.
513 * Reads and writes to @kdamond from outside of the monitoring thread must
514 * be protected by @kdamond_lock.
516 * Note that the monitoring thread protects only @kdamond via @kdamond_lock.
517 * Accesses to other fields must be protected by themselves.
519 * @ops: Set of monitoring operations for given use cases.
520 * @callback: Set of callbacks for monitoring events notifications.
522 * @adaptive_targets: Head of monitoring targets (&damon_target) list.
523 * @schemes: Head of schemes (&damos) list.
526 struct damon_attrs attrs;
528 /* private: internal use only */
529 /* number of sample intervals that passed since this context started */
530 unsigned long passed_sample_intervals;
532 * number of sample intervals that should be passed before next
535 unsigned long next_aggregation_sis;
537 * number of sample intervals that should be passed before next ops
540 unsigned long next_ops_update_sis;
543 struct task_struct *kdamond;
544 struct mutex kdamond_lock;
546 struct damon_operations ops;
547 struct damon_callback callback;
549 struct list_head adaptive_targets;
550 struct list_head schemes;
553 static inline struct damon_region *damon_next_region(struct damon_region *r)
555 return container_of(r->list.next, struct damon_region, list);
558 static inline struct damon_region *damon_prev_region(struct damon_region *r)
560 return container_of(r->list.prev, struct damon_region, list);
563 static inline struct damon_region *damon_last_region(struct damon_target *t)
565 return list_last_entry(&t->regions_list, struct damon_region, list);
568 static inline struct damon_region *damon_first_region(struct damon_target *t)
570 return list_first_entry(&t->regions_list, struct damon_region, list);
573 static inline unsigned long damon_sz_region(struct damon_region *r)
575 return r->ar.end - r->ar.start;
579 #define damon_for_each_region(r, t) \
580 list_for_each_entry(r, &t->regions_list, list)
582 #define damon_for_each_region_from(r, t) \
583 list_for_each_entry_from(r, &t->regions_list, list)
585 #define damon_for_each_region_safe(r, next, t) \
586 list_for_each_entry_safe(r, next, &t->regions_list, list)
588 #define damon_for_each_target(t, ctx) \
589 list_for_each_entry(t, &(ctx)->adaptive_targets, list)
591 #define damon_for_each_target_safe(t, next, ctx) \
592 list_for_each_entry_safe(t, next, &(ctx)->adaptive_targets, list)
594 #define damon_for_each_scheme(s, ctx) \
595 list_for_each_entry(s, &(ctx)->schemes, list)
597 #define damon_for_each_scheme_safe(s, next, ctx) \
598 list_for_each_entry_safe(s, next, &(ctx)->schemes, list)
600 #define damos_for_each_filter(f, scheme) \
601 list_for_each_entry(f, &(scheme)->filters, list)
603 #define damos_for_each_filter_safe(f, next, scheme) \
604 list_for_each_entry_safe(f, next, &(scheme)->filters, list)
608 struct damon_region *damon_new_region(unsigned long start, unsigned long end);
611 * Add a region between two other regions
613 static inline void damon_insert_region(struct damon_region *r,
614 struct damon_region *prev, struct damon_region *next,
615 struct damon_target *t)
617 __list_add(&r->list, &prev->list, &next->list);
621 void damon_add_region(struct damon_region *r, struct damon_target *t);
622 void damon_destroy_region(struct damon_region *r, struct damon_target *t);
623 int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
624 unsigned int nr_ranges);
625 unsigned int damon_moving_sum(unsigned int mvsum, unsigned int nomvsum,
626 unsigned int len_window, unsigned int new_value);
627 void damon_update_region_access_rate(struct damon_region *r, bool accessed);
629 struct damos_filter *damos_new_filter(enum damos_filter_type type,
631 void damos_add_filter(struct damos *s, struct damos_filter *f);
632 void damos_destroy_filter(struct damos_filter *f);
634 struct damos *damon_new_scheme(struct damos_access_pattern *pattern,
635 enum damos_action action, struct damos_quota *quota,
636 struct damos_watermarks *wmarks);
637 void damon_add_scheme(struct damon_ctx *ctx, struct damos *s);
638 void damon_destroy_scheme(struct damos *s);
640 struct damon_target *damon_new_target(void);
641 void damon_add_target(struct damon_ctx *ctx, struct damon_target *t);
642 bool damon_targets_empty(struct damon_ctx *ctx);
643 void damon_free_target(struct damon_target *t);
644 void damon_destroy_target(struct damon_target *t);
645 unsigned int damon_nr_regions(struct damon_target *t);
647 struct damon_ctx *damon_new_ctx(void);
648 void damon_destroy_ctx(struct damon_ctx *ctx);
649 int damon_set_attrs(struct damon_ctx *ctx, struct damon_attrs *attrs);
650 void damon_set_schemes(struct damon_ctx *ctx,
651 struct damos **schemes, ssize_t nr_schemes);
652 int damon_nr_running_ctxs(void);
653 bool damon_is_registered_ops(enum damon_ops_id id);
654 int damon_register_ops(struct damon_operations *ops);
655 int damon_select_ops(struct damon_ctx *ctx, enum damon_ops_id id);
657 static inline bool damon_target_has_pid(const struct damon_ctx *ctx)
659 return ctx->ops.id == DAMON_OPS_VADDR || ctx->ops.id == DAMON_OPS_FVADDR;
663 int damon_start(struct damon_ctx **ctxs, int nr_ctxs, bool exclusive);
664 int damon_stop(struct damon_ctx **ctxs, int nr_ctxs);
666 int damon_set_region_biggest_system_ram_default(struct damon_target *t,
667 unsigned long *start, unsigned long *end);
669 #endif /* CONFIG_DAMON */
671 #endif /* _DAMON_H */