mm/damon/reclaim.c

1 // SPDX-License-Identifier: GPL-2.0
3  * DAMON-based page reclamation
8 #define pr_fmt(fmt) "damon-reclaim: " fmt
14 #include "modules-common.h"
26  * do no real monitoring and reclamation due to the watermarks-based activation
37  * of parametrs except ``enabled`` again.  Once the re-reading is done, this
39  * re-reading, DAMON_RECLAIM will be disabled.
66  * Desired level of memory pressure-stall time in microseconds.
70  * memory pressure is incurred.  System-wide ``some`` memory PSI in microseconds
73  * disabling this auto-tuning feature.
81  * User-specifiable feedback for auto-tuning of the effective quota.
87  * this auto-tuning feature.
144  * Else, -1.
146 static int kdamond_pid __read_mostly = -1;
165 		/* for min_age or more micro-seconds */  in damon_reclaim_new_scheme()
201 	err = -ENOMEM;  in damon_reclaim_apply_parameters()
212 		damos_add_quota_goal(&scheme->quota, goal);  in damon_reclaim_apply_parameters()
219 		goal->current_value = quota_autotune_feedback;  in damon_reclaim_apply_parameters()
220 		damos_add_quota_goal(&scheme->quota, goal);  in damon_reclaim_apply_parameters()
248 			kdamond_pid = -1;  in damon_reclaim_turn()
259 	kdamond_pid = ctx->kdamond->pid;  in damon_reclaim_turn()
317 		damon_reclaim_stat = s->stat;  in damon_reclaim_after_aggregation()
334 	ctx->callback.after_wmarks_check = damon_reclaim_after_wmarks_check;  in damon_reclaim_init()
335 	ctx->callback.after_aggregation = damon_reclaim_after_aggregation;  in damon_reclaim_init()