From nobody Fri Dec 19 12:08:06 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CBA402848BA; Thu, 9 Oct 2025 21:20:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760044851; cv=none; b=WcQX5bTrokqZ6EN9gP5d45tGTuPnM+p0O+kyl+I6XGPyttIyodVpjg5c4mKDkNt6eHAoau1S4VC30EkCXeQfSf2/sv1AjRY5HpVhzlhzkg8Q5x48kh+AOS/i57WFdfHlUgu0ym+Czm77lamob2E+LB6WTFCveSmkuB5VPaRrNSU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760044851; c=relaxed/simple; bh=MELVaEdB76EUyKbmw0NbQ1QbyTF6YUPeLThLKL8ekdI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ayIWcSAU4e/yYOl9v0KM2aX+cwcA/pZX0aasmP4bipkH6EaafioAUPqjDr47smhGConBoTa1XHZVAaIsxjMIb24k4ZWUmPnsdLOb9nABXZymOSIPs3Euj+X3x0brebck7ARRCTd/hVsb/Kux6by5LxaYgz2SF59kWzRmBs6Zvnw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PZ2h/KzW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PZ2h/KzW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38DA5C4CEF5; Thu, 9 Oct 2025 21:20:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760044851; bh=MELVaEdB76EUyKbmw0NbQ1QbyTF6YUPeLThLKL8ekdI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PZ2h/KzWkitVsziIxgaErvpPM9viuTpu0shAGsztfn/w1g7LyXyWlYKhhdz5QPSa7 qORE1jFoMNu7CtMBFlwtcu7CzXU4nc4FCaFs2xUBnclVOpdOb8AeIwe2mgJgPX7mha 197naWxHrdYB1uxa7Lr9cPe0bIUluaWJK0jU3rf+nHrwpUy/6SNlExHp1l6eiDwXQl Ujo30TV9LJPaaQ50xinRxP8TXoReG7+YYOrkXHcBZ8LuAdLGn2BvQdX0Tg4pGDvw+j 43W2tj0aAnNgMFp/Pqjc/nPdKoAAU9i78kGGVNzwIHUvI6bANiF5RSBLmd0WyR3IIO WMRnrlpDXHdGw== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 03/10] mm/damon/core: implement DAMOS_QUOTA_NODE_MEMCG_USED_BP Date: Thu, 9 Oct 2025 14:20:35 -0700 Message-Id: <20251009212042.60084-4-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20251009212042.60084-1-sj@kernel.org> References: <20251009212042.60084-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implement the handling of the new DAMOS quota goal metric for per-memcg per-node memory usage, namely DAMOS_QUOTA_NODE_MEMCG_USED_BP. The metric value is calculated as the sum of active/inactive anon/file pages of the given cgroup for a given NUMA node. Signed-off-by: SeongJae Park --- mm/damon/core.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/mm/damon/core.c b/mm/damon/core.c index 93848b4c6944..1eacf78aa358 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -2032,12 +2033,46 @@ static __kernel_ulong_t damos_get_node_mem_bp( numerator =3D i.freeram; return numerator * 10000 / i.totalram; } + +static unsigned long damos_get_node_memcg_used_bp( + struct damos_quota_goal *goal) +{ + struct mem_cgroup *memcg; + struct lruvec *lruvec; + unsigned long used_pages; + struct sysinfo i; + + rcu_read_lock(); + memcg =3D mem_cgroup_from_id(goal->memcg_id); + rcu_read_unlock(); + if (!memcg) { + if (goal->metric =3D=3D DAMOS_QUOTA_NODE_MEMCG_USED_BP) + return 0; + else /* DAMOS_QUOTA_NODE_MEMCG_FREE_BP */ + return 10000; + } + mem_cgroup_flush_stats(memcg); + lruvec =3D mem_cgroup_lruvec(memcg, NODE_DATA(goal->nid)); + used_pages =3D lruvec_page_state(lruvec, NR_ACTIVE_ANON); + used_pages +=3D lruvec_page_state(lruvec, NR_INACTIVE_ANON); + used_pages +=3D lruvec_page_state(lruvec, NR_ACTIVE_FILE); + used_pages +=3D lruvec_page_state(lruvec, NR_INACTIVE_FILE); + + si_meminfo_node(&i, goal->nid); + return used_pages * 10000 / i.totalram; +} #else static __kernel_ulong_t damos_get_node_mem_bp( struct damos_quota_goal *goal) { return 0; } + +static unsigned long damos_get_node_memcg_used_bp( + struct damos_quota_goal *goal) +{ + return 0; +} #endif =20 =20 @@ -2058,6 +2093,9 @@ static void damos_set_quota_goal_current_value(struct= damos_quota_goal *goal) case DAMOS_QUOTA_NODE_MEM_FREE_BP: goal->current_value =3D damos_get_node_mem_bp(goal); break; + case DAMOS_QUOTA_NODE_MEMCG_USED_BP: + goal->current_value =3D damos_get_node_memcg_used_bp(goal); + break; default: break; } --=20 2.39.5