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b=CB+zU6z9na5QxzyFeOVEHjm4j4++wzKU5Oklr0+5bXlWtfixPIpE3D9rUdi5jqCRe FNPC8diLEl95GGpbTC7MCKVT85nM4UyO9Jy7BHuera8KbmN6z7OYS6NSAYYOpJWZGl drphJyr/JQZQmsOzGaSi+XAU08o+bUBXyJ07dmxKrVl3Rl3rjSDguJ1bERpglsnHef ysDSMA8uMWT5+NYEN3Vjv/yPc3Y6r5ed9OzhKhENhBqPXqrCgo7O/j69Rvw0K23jkS 4nMAdsG0nYkj5Nok4CqXsQt2+lF7PGsXwyacsUvjayeVEQsMSmisLYxrF71IoLi0+m 1RH/u3ZsRXcqA== 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 05/16] mm/damon/core: implement damon_probe_hits_wsum() Date: Mon, 6 Jul 2026 07:18:59 -0700 Message-ID: <20260706141912.88445-6-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-Rspamd-Queue-Id: A1647140007 X-Rspam-User: X-Stat-Signature: eyf6n5gdgd8jp9ooq7nyhyx7k7msdc9x X-Rspamd-Server: rspam03 X-HE-Tag: 1783347562-47581 X-HE-Meta: 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 llG26XnD /VChIvVHy2bE7TaI0K+kTAkIxsNqFJj9cMfbpgR+xJBY6ndNU4gWobdHOMLegfTH09VslYQOXq3ppLXAjw8c/H4FE8Vfn2G1GP5n+aCIfP7zYITZteihH5sPBy3sMpX72FfsTrImwxcQ64gn5cea4F5RBlH/k8+wn2w2SL5V+l6MmXQMab3hzkXdGg9hVTA5Pv6avhCa8h2nm91dSg2Jl+fbF68Ed1JHfXYdRzFyPt0Avt8t0uGoA7yIGh+xto7isU+mNha2adpIWt1/aIFOhTpP2QA== 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 e1244a06ac7e4..7ecfd72cb21a2 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 e42f512d87a11..d7d1e27d767eb 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -390,6 +390,30 @@ 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 weigted sum of. + * @last: if the request is for last-window agggregated 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