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b=lc3t1gDNtfXoYZS3W+1hV7V78KeIb0Oo+qj2NIguCzvYm//NsMT0Y42liJ+hLlsnj uW2Etkq33qYqrHkfAp85/Zi1ubHF7Qkdlk6u3shlrtVWBE/stJQdOWZ+az7s79rXz7 U5kakfVjN7LTvr2gaRKo+HkGzgHZ4peB3Bf/PoxQPRsVfUtH+gJUo/7SvyatbnBnwr vizacExzYAYxTabWIMKBmgMxq7m99fwM6Q9Lveb3mfyhAXkdTvkpEnt4PtH0BTeZKL zff+52ALIdIroPCCxTYiqh0Iv9I1z0pUnudjCy6SW6STw5so8/g24jnnq5YB220beM j5+Lad2ZjYM2w== 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 05/16] mm/damon/core: implement damon_probe_hits_wsum() Date: Sun, 5 Jul 2026 13:57:27 -0700 Message-ID: <20260705205743.98656-6-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: rspam05 X-Rspamd-Queue-Id: C1982120002 X-Stat-Signature: fu37g5birwzaah3xa5o1g1ri4jdqrfwb X-HE-Tag: 1783285075-333657 X-HE-Meta: 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 3lq8Lp6g H2EDDRmawyyq/ptrGT7l2l62Reodu9urgJOSQ2v6FJKNOjOOOXl6Y96Q38S/uRl0WtPxaImZWo33ijaGzU6GUW93tPuCTvwv1QGd2xkxcIFMFDooDwdJ4iaNtOzlUa48dr6IE0kxXkhf52vlFAO5znRY/LS7cp9p8/fDvvyLxe3zM2SU5Cm5a6txsnlDcXFIijTEVPLRP2ERmTUbclopfm+8yTZZgNp9Ctl23Ykw8fR4F6gzHj2NaNKVnv9BuljTO8CwCrgJ9HcdiWO3Uw0kJU5U5LA== 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 62caa67a3c40c..c43986a3aa16c 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -1011,6 +1011,8 @@ 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