From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F071BC43458 for ; Thu, 9 Jul 2026 14:06:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B622B6B0095; Thu, 9 Jul 2026 10:06:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B12346B0099; Thu, 9 Jul 2026 10:06:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A00BE6B0095; Thu, 9 Jul 2026 10:06:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 7AF6A6B0092 for ; Thu, 9 Jul 2026 10:06:08 -0400 (EDT) Received: from smtpin23.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 0F1DDC09C4 for ; Thu, 9 Jul 2026 14:06:08 +0000 (UTC) X-FDA: 84969412416.23.13A1F80 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf25.hostedemail.com (Postfix) with ESMTP id 5FB64A0005 for ; Thu, 9 Jul 2026 14:06:06 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=nUz3sC9V; spf=pass (imf25.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783605966; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=Jsk2BdFiGUHsrTa06Z4d2++A0lkUUpW19Iv6q2KjyUE=; b=tQfNSdf1LwJZbGME016VNg8s9kulitA8zJjXo76a4exUrtBIWLDF+lvri2rH/xi9c4LzdT Q+WU6ijK3cBaV7jkpqUDWPwy8oZn/Cjcy+4+JY4uOepPacppoxq36287GU4r0bH+HbkKZ5 TpkKXOtgMljQqfVpf0KzDeyKayvTZQY= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=nUz3sC9V; spf=pass (imf25.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783605966; b=dk+3DcWCBcjTAFq4x4FF3FCIcsksR1HS583Qs/H1dQNdt7PzSUjRv3SR6L/T4jn7b1XUda rcm9c8hFvP+nSoc0O03GvVemS63nsENYa1ZJMeqXR3/VWp2NYesdgeEL+RoiU2rtWJlVqZ WwVGJTcRtWkHGqwCshGPRaDLGGF1nM8= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id B254842DBD; Thu, 9 Jul 2026 14:06:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 711D71F00A3D; Thu, 9 Jul 2026 14:06:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783605965; bh=Jsk2BdFiGUHsrTa06Z4d2++A0lkUUpW19Iv6q2KjyUE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nUz3sC9VogqnlEvDBz6j8GRzhpUezqHRCGtum/c7bvZGwCk6XNOD6+2h5Qm9YgPlr TVsnDPKThnYjQ1HrJgw4weB53Z7F44YWf4LYJmXef/N96Z7udtgMl4BA0ucxyRwHtU SbcjrDuBpwkCyCNbLPZU6OdmxUfItPEfhI/9F8IHkeZHYNFwfsitIpfY/X6ZM8TP0c Ttx6HjHtPKFpEI58LQLgjdW7FQxItyAwLFcvYEDiAJh82d2YM2wXlu4nCuDl3epuDf R78rwDqNSiw8q+JSbtFk/qHcv7F6avCsUUae8cRm5tm+jW/Tf/orTqETit8rj24y+B qopUIlxBhdyFQ== 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 v1.2 05/19] mm/damon/core: implement damon_probe_hits_wsum() Date: Thu, 9 Jul 2026 07:05:43 -0700 Message-ID: <20260709140600.90950-6-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260709140600.90950-1-sj@kernel.org> References: <20260709140600.90950-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 5FB64A0005 X-Stat-Signature: gumjneyxxt583ywpu5uxhssy8rtst5g5 X-HE-Tag: 1783605966-182551 X-HE-Meta: U2FsdGVkX19xi+hu9yUbVO4bHab8nUouFMbc1DixCXXN7Ug2hM24yqV0Yqou3RvmhQEVwpnot1MaYj7BHGXkyRXfdOq2CISfeTFcOaqvWAy1X1/lipvqBfOqObzFIVkiPuQPJL68UVb6xOXhknV54nIYRCqZINiVrQSeGllbh3Ov/3eNNVvhLdW/IHOITiazpfgmPdngJVITMWHZNPqfONkDsB1n+aqjAioCmz/eCSCBpTQ9B8ZotdSP5osi2xx0t7Wv7HYTAZnr0T2KpgDix4Xl5TrKCSbiBzAHK0055QsC3ub+5fg8BQErAl22XEGc/zgnRn0uKbr/RhgyclzbLMKCO11j97KSrBl5H38GGSzJ28YKOy0bFeM3SZ4Ub0gJdpvnO5dp64dbbnTQoizR4lTtCwkjfqrVRJxZ3QwPbi5XSuU/2M1b+4J/jaWeJLzGzjw2zHhxq7RDbICRn1FFjxcifrFOYCvnvdbI19Tm2W33fZFPvPGsKczA3IDfW5XZHWb6t759eksZO74VQfc2TfiykLdbafFIC5C/QF6I2TnPz0/1lvWeWifltd2IgdYPxFhEnAV/jmzhi9ss1JcNZJB+/PraCamty+t02zdVJecPYb7tmLJMFU6uA9uUQkAGTWBmKZI5bPwayZ5bddWRkUeQydMysp6HXGXukYltVzd5sek2pw0OtLw86OtwCg9S/rz073750zVZS680XbbTumIONRt9ZQtoMMx3AEnOVeSMnzk722/8QKaWdanQHq6f3ZI3k10vIKxj718wpNC8YxyNW45ApjNpG8hLMGG8QuW3CkXlnzu+x2+ckeg0+Ntx08OyCWiNOOVyduij+yiadfuqc/sx+BAR81U/zfxFQmC+e04ux3u6iXDAdR/tcGiE0ObtZBIq+Q67/ORBszScROKL8DWRU6ZYYP084hf/EzT0Yr0kyJh4SMsI4OLmevnTQcvxVzzxRDKi7VYRUFR ZJd+NJMa 5sEcxcxmH3dVT9sJkgYnJqlnaNFF/Wq297BreQjnlQRcT+JNOoSeuFh++ceSey5J6sj5OpBAAz/1muh/yxncGQoQp/K8O9oPyF2LxCYnIlPCdX6E9yNzIYRKfE8lv0O3vuqzKHKe1gB5BkkPAhkabTbVPwXH/KmthJPG2uOmTT/6Z2XxTgk35XSHhPPk7JPJCqDu6A8sPu/If9uHdkcLB2iXAH4yUC/zIGfpGy6sdT7QmYT4ffXxQSbAZB6Js4jKWKt6WAaMJFow8FAP+WrE9/EqRZA== 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 4e1845ce83870..516fefaf54dcc 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