mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-08-31 12:52:29 -04:00
Code Issues Packages Projects Releases Wiki Activity

mm/damon/core: get merge threshold from probe hits when weights are set

Browse Source 
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>
This commit is contained in:
SJ Park
2026-07-10 06:46:43 -07:00
committed by Andrew Morton
parent b9bc678bfb
commit db697312bb
1 changed files with 14 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
mm/damon/core.c
View File

@@ -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)) {