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mm/damon/core: invoke kdamond_call() after merging is done if possible

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kdamond_call() callers may iterate the regions, so better to call it when
the number of regions is as small as possible.  It is when
kdamond_merge_regions() is finished.  Invoke it on the point.

This change is also aimed to make future changes for carrying online
parameters commit with damon_call() easier.  The commit operation should
be able to make sequence between other aggregation interval based
operations including regioins merging and aggregation reset.  Placing
damon_call() invocation after the regions merging makes the sequence
handling simpler.

Link: https://lkml.kernel.org/r/20250306175908.66300-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-03-06 09:58:57 -08:00
committed by Andrew Morton
parent 4c9ea539ad
commit bf74bdfd2e
1 changed files with 3 additions and 3 deletions
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6
mm/damon/core.c
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@@ -2421,7 +2421,6 @@ static int kdamond_fn(void *data)
if (ctx->callback.after_sampling &&
ctx->callback.after_sampling(ctx))
break;
kdamond_call(ctx, false);
kdamond_usleep(sample_interval);
ctx->passed_sample_intervals++;
@@ -2439,9 +2438,10 @@ static int kdamond_fn(void *data)
}
/*
* do kdamond_apply_schemes() after kdamond_merge_regions() if
* possible, to reduce overhead
* do kdamond_call() and kdamond_apply_schemes() after
* kdamond_merge_regions() if possible, to reduce overhead
*/
kdamond_call(ctx, false);
if (!list_empty(&ctx->schemes))
kdamond_apply_schemes(ctx);
else