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b=HSUTkoOH9HSk9Svfer6M1HuF05EItvDkO1cPTc/KGhCoJlkDDlXgx5Kf6Rj6xO0FT WkXLc3JkLt1bIL7i2KL29tc5DRxQ2tALQsqIlwfuzymvzeL2al4Kfs7fyaQhTouiO5 BpQAGujo5qq/MDnsJvvSvga2grou7oKWIMRXz2oy8tE9MBa7MI7mCjnsytXGPX0xS4 3K8gl6LSXiy0IUFsFWiFkNJU4zVe676PpJlYsUvcwr78hepYD++YdG9bmh6w8zjThW +QmevC/BQqskyc1RyT2zrEYPE/tmkc70HeJMCD7AHi9G+Yr5iTbNhxyDnn2jotGFTZ MjcC5p9TnSHOw== 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 v1.3 05/19] mm/damon/core: implement damon_probe_hits_wsum() Date: Thu, 9 Jul 2026 17:23:31 -0700 Message-ID: <20260710002349.111414-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260710002349.111414-1-sj@kernel.org> References: <20260710002349.111414-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 0F1EC100004 X-Rspam-User: X-Stat-Signature: p6frd9bniod4x9xtd4r5e5wf647fzsta X-Rspamd-Server: rspam03 X-HE-Tag: 1783643040-454600 X-HE-Meta: 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 E4aXzQJ9 Upi72V2enUJ0YrdDaTxdGaF8/W/i+dqZ3sFkai711Zys1OhkkzQsrD3S2cKJzpEb2GbYTaYZxwUH21TNRZ10hqgUnGsKrpmt8hk87uM3nyE+pEQICOMvAevFY5T3TLZkxzoiir00OUq4ULocP/4vy16ElgfeMPPr99jSHxlRM6wiWOlup80fm4WIQmsAgZADNd7CXyM/P3Qv3w/ZMO6WudOuwmWWtwm2A/4ukU+y8BC5R7OPgVxaV0l/OvdHRn5v6YDzKjkmVFfW3jnSiWwx5ieU22w== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: When damon_probe->weight is set, the weighted sum of probe hits will be useful. It will be useful for not only the users but also DAMON internal logics like regions merging. Implement a function for calculating it. Signed-off-by: SJ Park --- include/linux/damon.h | 2 ++ mm/damon/core.c | 24 ++++++++++++++++++++++++ 2 files changed, 26 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index e7acd8e610a64..f69442a9d4312 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -1012,6 +1012,8 @@ unsigned int damon_nr_accesses_mvsum(struct damon_region *r, struct damon_ctx *ctx); unsigned char damon_probe_hits_mvsum(int probe_idx, struct damon_region *r, struct damon_ctx *ctx); +unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, + struct damon_ctx *ctx); int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges, unsigned int nr_ranges, unsigned long min_region_sz); diff --git a/mm/damon/core.c b/mm/damon/core.c index 9f6cdd810bd8a..fea97399b5754 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -393,6 +393,30 @@ static bool damon_is_last_region(struct damon_region *r, return list_is_last(&r->list, &t->regions_list); } +/** + * damon_probe_hits_wsum() - Returns probe hits weighted sum of a region. + * @r: region to get the weighted sum of. + * @last: if the request is for last-window aggregated probe hits. + * @ctx: context of &r. + * + * Return: the weighted sum of probe hits of the region. + */ +unsigned int damon_probe_hits_wsum(struct damon_region *r, bool last, + struct damon_ctx *ctx) +{ + struct damon_probe *probe; + unsigned int sum = 0; + int i = 0; + + damon_for_each_probe(probe, ctx) { + if (last) + sum += r->last_probe_hits[i++] * probe->weight; + else + sum += r->probe_hits[i++] * probe->weight; + } + return sum; +} + /* * Check whether a region is intersecting an address range * -- 2.47.3