From nobody Sun Feb 8 21:46:19 2026 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 1AAB13328E9; Fri, 17 Oct 2025 21:27:14 +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=1760736435; cv=none; b=OK/gW1TWz8DwX5mmSRnQ6PtX15nxZgbl8dXi3uiI8otmCK43WJihgnFFhtG7FUBpwobyVC5445Bzj4vStyR5ZcEMk1iwmur82IIvFEFG2oNAlrm1H2a7T+6+ovmvZreueRWxWlOFC27ZF4F8Zq3DgLVS+y7QSc08KuLU1f1LH7w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760736435; c=relaxed/simple; bh=iAAhOa8iHX+RisUCri+NFUUzCjC4h64hfHQYSXDZ2Yo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qGhNV2ZJwy1FKdAqpTT22ceiSmIA8q4nuPsdeq0cG6vC2DZfsBJp21aZttT79aP4Gf1h0PXytPPnQ5NOj2Am1kIM6RwpJz0P6Y4I8KYNQrv6uzctf3hgowCWRGgl+R+b/voCnhReK3EO0XauwtJtv+mG9pa5xVOxLaQjDi6+CJ4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ClO42DOb; 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="ClO42DOb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D79EC16AAE; Fri, 17 Oct 2025 21:27:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760736434; bh=iAAhOa8iHX+RisUCri+NFUUzCjC4h64hfHQYSXDZ2Yo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ClO42DObtIDHCkighHiBPIiqG1Y9t1yUD0ZftzL3bpXV0fu1iIq6O8AWBs0LzK/r+ ibat0Nu5ckvHV+7FS9MbJ7OnU68VGC2GH6TO9uxb449RPNahkSUZ+CB91jLH6VqpmV TFmQ0MG/rUkj7H790bGAUrHG5BuhOHJA4ZIGLBQ3HM3i1ZeFbw2NcuIFzCTmIANMZ2 Gdhg7NTkL4Aadq9MuV6C7UMAjDhcQXv/4O+WZYjav9pvKpZ3aXYhzsyUHqxn67DJSZ UgP+NHEAHV6vhiKd6EKMFwYedkzxiHJyH5u2xeEZggrqJXEgG9thQNcms1OVPJN4cZ Yap3I7wPv4x1g== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 03/10] mm/damon/core: implement DAMOS_QUOTA_NODE_MEMCG_USED_BP Date: Fri, 17 Oct 2025 14:26:55 -0700 Message-ID: <20251017212706.183502-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251017212706.183502-1-sj@kernel.org> References: <20251017212706.183502-1-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 | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/mm/damon/core.c b/mm/damon/core.c index dbe48e43682b..00f1686d767f 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -788,6 +789,10 @@ static void damos_commit_quota_goal_union( case DAMOS_QUOTA_NODE_MEM_FREE_BP: dst->nid =3D src->nid; break; + case DAMOS_QUOTA_NODE_MEMCG_USED_BP: + dst->nid =3D src->nid; + dst->memcg_id =3D src->memcg_id; + break; default: break; } @@ -2035,12 +2040,46 @@ 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 @@ -2061,6 +2100,9 @@ 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 2.47.3