diff options
| -rw-r--r-- | include/linux/damon.h | 7 | ||||
| -rw-r--r-- | mm/damon/core.c | 8 |
2 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index 09a5d0d02c00..6cb5ab5d8e9d 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -343,6 +343,7 @@ struct damon_operations { * struct damon_callback - Monitoring events notification callbacks. * * @before_start: Called before starting the monitoring. + * @after_wmarks_check: Called after each schemes' watermarks check. * @after_sampling: Called after each sampling. * @after_aggregation: Called after each aggregation. * @before_terminate: Called before terminating the monitoring. @@ -353,6 +354,11 @@ struct damon_operations { * respectively. Therefore, those are good places for installing and cleaning * @private. * + * The monitoring thread calls @after_wmarks_check after each DAMON-based + * operation schemes' watermarks check. If users need to make changes to the + * attributes of the monitoring context while it's deactivated due to the + * watermarks, this is the good place to do. + * * The monitoring thread calls @after_sampling and @after_aggregation for each * of the sampling intervals and aggregation intervals, respectively. * Therefore, users can safely access the monitoring results without additional @@ -365,6 +371,7 @@ struct damon_callback { void *private; int (*before_start)(struct damon_ctx *context); + int (*after_wmarks_check)(struct damon_ctx *context); int (*after_sampling)(struct damon_ctx *context); int (*after_aggregation)(struct damon_ctx *context); void (*before_terminate)(struct damon_ctx *context); diff --git a/mm/damon/core.c b/mm/damon/core.c index 997cf7b17779..44fe7e452a1e 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1051,6 +1051,10 @@ static int kdamond_wait_activation(struct damon_ctx *ctx) return 0; kdamond_usleep(min_wait_time); + + if (ctx->callback.after_wmarks_check && + ctx->callback.after_wmarks_check(ctx)) + break; } return -EBUSY; } @@ -1077,8 +1081,10 @@ static int kdamond_fn(void *data) sz_limit = damon_region_sz_limit(ctx); while (!kdamond_need_stop(ctx) && !done) { - if (kdamond_wait_activation(ctx)) + if (kdamond_wait_activation(ctx)) { + done = true; continue; + } if (ctx->ops.prepare_access_checks) ctx->ops.prepare_access_checks(ctx); |