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b=VeLgLUh+rr1bHaq7sAsIy8KkttF3Wk9ow6qqHLK2hG/4sPALyBUbRDsJmRf8ospen REGrUy2G3/+oGnrx5zKJkOpytHDB9lYZWKRWkGqLivz+ULyXeeoG88ox7gDBY2zdho N1SMT5+vlgdKW9OkLzXIfhLCcq3/vJOJi9vlzvqd2J9yb1RrqAv6gy30FT0y4EerdP WW97+iqsoD2gHlZhW8Gibfod756Rx4npI0mWW/vVkM23GN9UAnW3TFNqP9Ovige50x HDfeD9UV51vbH3MhDxAZqfngfhxJkwUMXqMbNlTJMhzSKMhW2iTNY/+Vpx3PR+SZT/ f5WCzepUR5hRA== 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 v1.2 11/19] mm/damon/core: disable access monitoring when probe weights are set Date: Thu, 9 Jul 2026 07:05:49 -0700 Message-ID: <20260709140600.90950-12-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260709140600.90950-1-sj@kernel.org> References: <20260709140600.90950-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: 1yeebep66n8ocfo5qhtc876qg6kwgx7h X-Rspamd-Queue-Id: 8E448C0011 X-Rspamd-Server: rspam01 X-Rspam-User: X-HE-Tag: 1783605968-113876 X-HE-Meta: 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 jReZT38T /gIvmAlfQ/khRuc3y/V/coVsJfIXQoH4chznh4ySNgR4LIgXar20eKjdkboWXL8yi2jPlENQZ44kE9xDG5GpvFVXAvsbpZJVIRv0rfViokniILeGFGABx/Cp6VvBVbyZMoDt/xtnZdhZhK6wf6KKljIBHhHwLsQ6weBPIQ9P662cpvB+ouKy3hqVFWprZUtiq8EGIMHlRGhllqGjrxOjAzcyIF26BHQ9kgTlHnnt8yFA5IjE= 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 b585e4bf035f1..e250b7080708d 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -3763,17 +3763,18 @@ 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