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b=EIgAZYuofMDWd81/+UVkaNqqj3ZRSNPaKKACGMwYBeYRlMAAMvbM1f0BIQ3k5C4cg IJkwrmB9mApp2l2uhMwmV6p9yslrT1zn8/o09WwFBR499UwI1/ZK2T8F9Q6iCJRPKP FVMg/r4poJjC0So3O9QJxi3GDzcDAqu+jNn5SrLFoyahiyy4u5H1gCZPHCe+1aPf7Q qhlXct3Rsv7pOZHqIHPFhMOhzQ6lEEmY8IY/PNyf49L2E/+fS0Lz2CYwr1skOmJgxj ZNvJXYEEP6lPHq+rrFAXCDQHuvoYfhUyjbljcU9EvmyXreI+1iGsImGyRgFHbRDmLG npOcp8NEmAT3g== 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 v1.1 08/16] mm/damon/core: disable access monitoring when probe weights are set Date: Mon, 6 Jul 2026 07:19:02 -0700 Message-ID: <20260706141912.88445-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260706141912.88445-1-sj@kernel.org> References: <20260706141912.88445-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 8DEA410000A X-Stat-Signature: r4zsf5gkgajx1wkf77gpt77npf9po87a X-HE-Tag: 1783347563-783519 X-HE-Meta: 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 PcTA2Jbh sQtvdaujEo5Qcyc1wtH+Zx3QJj3zY4COQoC3uV7lkoUURnafrBPWQskHVwJtf9tB4GGQE5J7S4RPlq443BazUeOMu2EJfh6ko+XTBQTOdrKzmmoMPByhx6ECw1rPZS7jaZ2BDysD+41JFYGTwQKormWUXDBWqOs+G5+u96yUpGeXwb5tkNJh4OkIbuhYDt9gGuZFR2kHO0HdkCHhbGQhmhjoysjTXyEwc6iw1lHJYirO6QpA= 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