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b=h+GZnBQFWF3S+QHnUQcBAWTNuuqGOYf13WlRZGm34i8t9SEhEAlcnPFh1+SO1dd/g 34w1MqXFm3ZOB0BvK6M+AQexvrGwgH7K/1bnWJUtfuxUoT6m3ZU9uTFmkigA2s1ZJ+ wRIYf511g+Cq3zCFPVc+fljCJG7Imr4vezVGdfp9ii40+o1bwBAr9+Ff9cdrBFakxr iN9GV/3u/nRz3PQ3QKbxjU6abzvuYrEF23Gp+VFglg1kGtzGpnpYO6A6n/PG/s8xV6 CWUBL5ll6VjDcjgTkxZZdLKmN3h3xazG4JublqWzTTvmL571Rb52SLvUideSgvEG+T 62g+eDOQGwONQ== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 05/19] mm/damon/core: implement damon_probe_hits_wsum() Date: Fri, 10 Jul 2026 06:46:34 -0700 Message-ID: <20260710134651.18084-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260710134651.18084-1-sj@kernel.org> References: <20260710134651.18084-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: B12291A0004 X-Rspam-User: X-Stat-Signature: 1awz8q3jcxsoxau46tjijtez4ezc5gh4 X-Rspamd-Server: rspam03 X-HE-Tag: 1783691222-664407 X-HE-Meta: U2FsdGVkX18UbN/+jVzQzip6Po2hqaAY4r7lTelFj801FuwV/gMVrxBPJSABEZ1QteEJHtVfuSEuBSgT+Wt5P20SFXKEhIRSfOugMSCHwcFJ7L8ukrK37jm7wkLGPAmhElVKaauGoOjFFm27MD918STggS7tyIWbTyn6G9gPhJ7g3JWWCxy+YNg+fVS9c4pTunZMNGmY1no523YkZ8LplyADsk4g5p7lcjsGj4JWrSfd4kEcm+Sdsx5T/tDoeHmL5E9luMtYkESBlsWe+PIrQGzpm2lD6b6OKLFNNTqEMn5tXvZX5iS/+SmBUQ/DS5DgSy0Jm5WByQESXGO6jYthqBoGj4i/Dtpa69Uqn2UFNF/ppKwdbW4BxJxrH1G7ohvurrwuu5/GRTJbJufrUaHaD/i8uPL15anwqb4UdF/NNtobBnuboABingjtszYWhScyZIze73by/BF2+3eJGQ7mXKLHmfo3EExO+Cf1XF7qtZulS4T9Q9WFEa3fiT4Tnua6dx4QBsbW2QX7vf5j2pTG+xpfp0355fZDiXqcTKAuH2NWASTuVIrSYjcPtHbLAkXISIh4+FKhDKAcQSwVC0PB/zyAz4YZOq/M67/uWxY8eMk6mvwe1JEztBJsQLikl0jh3OR876zUa8y7G0z6fUrMtvXM3Gnsm3dNWvuy6hdSVBFdg2oR8DIg3LFZrT46WqWMAx4/w+1phMfM/qM6iVE9gnkkcEbViwKE441f79gXSb7eIfgm/X1Ixjjvv3JQAfCUvqGDDmif49EM7jagRFT6x6mbUMVX6N59/M95xMsp9zMaajAByhvbdEbT+JPvYZTrEwHUNHF2Z+p9o8uE6C4qoAuIPBnLe4IVq6twG3Jxg3/EAWvrp2MaavhbHvW+iW+lPRCxbDLDtQbUBznUHDzndna/WPk+6Y0V9f0MlAbE8kbHv0/vXr1LuyFCA+6pCQir7Zpwp20oz6tC2+3tH0h kN+zM+0s ezdn5rz9zXTmVBsle/eFY8jwTd6sL+rpXto6y+NNFaSlRiHJmmXGxy6csFUpMKePfQ+EyrI7XoH3PvL9x1Dn2pphnxl7tn4akfZAA7sxYRp/GgMYatQtoP1EkG0YhvEcqSErVKf7D7+4mFIWkTnH26xtFjzB9Myu+nyAxBujuiyGzbos++hrEAP+kgBi7uSSjjZUtFF3zT29xELb6FCeuavV6E0x9/en/D1ynueZ6V09rzSrT8mfjs/1GAJvQ7Af6p/mSbXAfCLxRnraSgMejJL4jCA== 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