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b=WwVyRiW5rsxPwlJh+5kk4V454aIQaLqpXiurpK0plRnh7GJjP/XZhNTwbEGWOOF7p /whtAWXYP81oJriugLVSbpDNK5IkxKJ1Ejg5rP9f0M5y997hRuFcRXDcViyiMmbNwq /06vsutBypmFJl2M9qnhwkeaRIJ4HaB9gsygso1AHWyBWv2so+irzL9xuiUrvgrg/q 3/u5efHoT/MFfuflgTHEIIKR0OOsq1GC2x51NFPCQ9KwpNUzI1vh9tNkopNR6j8nCZ wDygJEbkgAaR8w5hG8/bGK6fuyCFNiEsxJkHgQGbICCRqLIeTjiCwz8/k3B9jKrXR4 vCwt6LGRMvLYg== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 08/16] mm/damon/core: disable access monitoring when probe weights are set Date: Sun, 5 Jul 2026 13:57:30 -0700 Message-ID: <20260705205743.98656-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260705205743.98656-1-sj@kernel.org> References: <20260705205743.98656-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 15EC740002 X-Stat-Signature: gbfm6iiwsbgnho5err7nk53ne7d9qc64 X-HE-Tag: 1783285076-720719 X-HE-Meta: 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 ijKoX2Me //Gr9GTmbP3bYtenKRCaQHGrfCkjt7lii4LfTWQnkgCD8ByEmAxgIb91EDG+REI8bxKpXYA6h9VH19GcHiIcJPSTsMGNGsJVUAfTVylclb2QDgfYCN69Zei5kUe/u8bSgVH3sot64kaL4HqWHVWCP5I3LMlHHt82Fjq2+uavBd9U4PWqMtlwS0vX/fxXwQmvrsFcRiB3r2z+Y7BI3yoIy0Pwy++yWIayzqkrSI3dVtOdY7sw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: When users set probe weights, they are interested in the data attributes. Not necessarily they are interested in data access patterns. Disable the data access monitoring in the case. Signed-off-by: SJ Park --- mm/damon/core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index 9bb884ab135ec..ad0f28469e633 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3714,17 +3714,18 @@ static int kdamond_fn(void *data) unsigned long next_aggregation_sis = ctx->next_aggregation_sis; 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); if (kdamond_wait_activation(ctx)) break; - if (ctx->ops.prepare_access_checks) + if (!access_check_disabled && ctx->ops.prepare_access_checks) ctx->ops.prepare_access_checks(ctx); kdamond_usleep(sample_interval); ctx->passed_sample_intervals++; - if (ctx->ops.check_accesses) + if (!access_check_disabled && ctx->ops.check_accesses) max_nr_accesses = ctx->ops.check_accesses(ctx); if (ctx->ops.apply_probes) ctx->ops.apply_probes(ctx, false, false); -- 2.47.3