From nobody Fri Dec 19 04:51:15 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 817B21A0728; Thu, 19 Dec 2024 04:03:48 +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=1734581028; cv=none; b=AZZtUe+DKYtVVL7UGQ1zALpqDTZnGkmqW76sSVA4LlQFaUuMIlZlJvXqKNcDIGhfJR9+QB1UYJ2RiVUPnGUPZ31xSn6DT1KLTl0CFnIp27YXO4UCBFk8p4l+MeEcgNk+3w1/gCxDsd7wcQ0jApKSiJxOGKrq+ATrX7nnteBLCtI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734581028; c=relaxed/simple; bh=64D8a6jEKpsztUjzJW7u7/dJMtao+tMWa0luqj3yM0M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pOM+IGYrf6MyLakVMhwfxqexJGow/1EloEHo8JmrWmQvBEtKiyHLXG1RkGkk1AR6vVrJni8bQAQk3sT1k8Vhg0wzGAEowhMx4SUUIlWd2PHXGm3ArOZl7kityo6UEd0FalU225qh1TvIKMTDnIWlaxoNPjHVXTMYSgi2E/yIGj4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DBmQQXmZ; 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="DBmQQXmZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D239BC4CED6; Thu, 19 Dec 2024 04:03:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734581028; bh=64D8a6jEKpsztUjzJW7u7/dJMtao+tMWa0luqj3yM0M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DBmQQXmZIOIzv5rl3Sq/NBNabDLR6GahdM2WjV4Ilu0m0t00lMHKeClh3MFv8z2Qy +sIXM5KGE/KBmNlWN7szTk8ucFGmzSRWp8Wmewl0/Dhr1A1vLEL2bd4D3I0LyRreVV PrZIr/PctZNuWPZwMzNxn/zrpr3E1Zh0DCtst3435UjDHeWAQqXByNN3HBUYKEsGZe aB3TtSjRyZ0CQeu1cC2u9vDYqYqB1jwW+cvNUqlTFIfG5cLuUknjpkaodwSKbfDIF+ FrQP77iHzd8QeOe7WMPUl0sHVFXFJjY3kPT+YAAcv5otXGHeHEE9jv1qgdrpJH3g/l wC8CNBbAKoWmw== From: SeongJae Park To: Cc: kernel-team@meta.com, SeongJae Park , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 08/18] mm/damon/core: implement per-scheme filter-passed bytes stat Date: Wed, 18 Dec 2024 20:03:17 -0800 Message-Id: <20241219040327.61902-9-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241219040327.61902-1-sj@kernel.org> References: <20241219040327.61902-1-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 a new per-DAMOS scheme statistic field, namely sz_ops_filter_passed, using the changed damon_operations->apply_scheme() interface. It counts total bytes of memory that given DAMOS action tried to be applied, and passed the filters of the scheme. DAMON API users can access it using DAMON-internal safe access features such as damon_call() and/or damos_walk(). Signed-off-by: SeongJae Park --- include/linux/damon.h | 3 +++ mm/damon/core.c | 6 ++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index bff39c23f16e..4a68bb38aad5 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -291,6 +291,8 @@ struct damos_watermarks { * @sz_tried: Total size of regions that the scheme is tried to be applied. * @nr_applied: Total number of regions that the scheme is applied. * @sz_applied: Total size of regions that the scheme is applied. + * @sz_ops_filter_passed: + * Total bytes that passed ops layer-handled DAMOS filters. * @qt_exceeds: Total number of times the quota of the scheme has exceeded. * * "Tried an action to a region" in this context means the DAMOS core logic @@ -315,6 +317,7 @@ struct damos_stat { unsigned long sz_tried; unsigned long nr_applied; unsigned long sz_applied; + unsigned long sz_ops_filter_passed; unsigned long qt_exceeds; }; =20 diff --git a/mm/damon/core.c b/mm/damon/core.c index c7ae95d6b7ba..8540e8f91260 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1354,13 +1354,15 @@ static bool damos_skip_charged_region(struct damon_= target *t, } =20 static void damos_update_stat(struct damos *s, - unsigned long sz_tried, unsigned long sz_applied) + unsigned long sz_tried, unsigned long sz_applied, + unsigned long sz_ops_filter_passed) { s->stat.nr_tried++; s->stat.sz_tried +=3D sz_tried; if (sz_applied) s->stat.nr_applied++; s->stat.sz_applied +=3D sz_applied; + s->stat.sz_ops_filter_passed +=3D sz_ops_filter_passed; } =20 static bool __damos_filter_out(struct damon_ctx *ctx, struct damon_target = *t, @@ -1580,7 +1582,7 @@ static void damos_apply_scheme(struct damon_ctx *c, s= truct damon_target *t, r->age =3D 0; =20 update_stat: - damos_update_stat(s, sz, sz_applied); + damos_update_stat(s, sz, sz_applied, sz_ops_filter_passed); } =20 static void damon_do_apply_schemes(struct damon_ctx *c, --=20 2.39.5