diff options
| author | SJ Park <sj@kernel.org> | 2026-07-10 06:46:43 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-08-04 19:18:52 -0700 |
| commit | db697312bb572aab92601c71497f90c7e5c7fb45 (patch) | |
| tree | e9a3fe9e47412e189024c2f85549e81bc8322b90 | |
| parent | b9bc678bfb6bfdad9b2dcdc4bce33018f81c33ac (diff) | |
| download | linux-db697312bb572aab92601c71497f90c7e5c7fb45.tar.gz linux-db697312bb572aab92601c71497f90c7e5c7fb45.zip | |
mm/damon/core: get merge threshold from probe hits when weights are set
When probe weights are set, DAMON merges regions based on their probe hits
weighted sum. But the merge threshold is calculated based on the access
frequency. Update it to retrieve the maximum probe hits weighted sum in
the snapshot from apply_probes() ops callback, and generate the threshold
based on it.
Link: https://lore.kernel.org/20260710134651.18084-15-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/damon/core.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index f7782c69037d..91964336ce31 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3763,7 +3763,8 @@ static int kdamond_fn(void *data) unsigned long next_ops_update_sis = ctx->next_ops_update_sis; unsigned long sample_interval = ctx->attrs.sample_interval; bool access_check_disabled = damon_has_probe_weights(ctx); - unsigned int max_merge_score = 0; + unsigned int max_merge_score = 0, max_wsum; + bool get_max_wsum; if (kdamond_wait_activation(ctx)) break; @@ -3776,9 +3777,18 @@ static int kdamond_fn(void *data) if (!access_check_disabled && ctx->ops.check_accesses) max_merge_score = ctx->ops.check_accesses(ctx); - if (ctx->ops.apply_probes) - ctx->ops.apply_probes(ctx, access_check_disabled, - false); + if (ctx->ops.apply_probes) { + if (time_after_eq(ctx->passed_sample_intervals, + next_aggregation_sis) && + access_check_disabled) + get_max_wsum = true; + else + get_max_wsum = false; + max_wsum = ctx->ops.apply_probes(ctx, + access_check_disabled, get_max_wsum); + if (get_max_wsum) + max_merge_score = max_wsum; + } if (time_after_eq(ctx->passed_sample_intervals, next_aggregation_sis)) { |