From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1863B48593F; Thu, 10 Sep 2026 14:19:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; cv=none; b=A5RBQlJIFKoK+IaHY268CuDyy38OPeJOFHZEx1lO1C49KhXmYIljcj1hHIK8BPag+EdUDClros00H/ml6QjaBAvkEQKrUWua+5T8jMpvk6H1Eoo/lr49SEVX3kZYgr2+fqtxvnshhTAKo57P54uqnwIFk7SF8r8nBbRB0Viyo/4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789049942; c=relaxed/simple; bh=ruEQIQfN7/9KLmSy9ZqhbJfPjDew7W2dWmDZIYZGTBU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VwIsB41rWdtLICuq+S0jo4HRx/2Nd+EeqWeQUKy/wMdzjDB3qfs0VOy+TTm4/hOj7Nfi/JWf3WDQj97CFQyrgQwHEOR25uRx13vVJh+vW0IE53bQNgd+VXpNRWGsdZrX7Yl94+U7vARyhthFxUMZf9gw+DTNX0+z7PgttwCvp+k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DcrDdV2O; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DcrDdV2O" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 755CB1F000FF; Thu, 10 Sep 2026 14:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789049940; bh=j8SWQuWvWu2mDr3ZPa1cO5y8fbw9Oppo9ANwQ11kECE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DcrDdV2OuRczE/ZW01khn6Ch9zyR3ESaeUpagDfMSI2MQIro4saeKfS41yfx4KyGB iTHZvtRAZNMsDC3NgX6oljEhhaMzFTZvrXKXx2aF/NDTOr9mP+pkyRwd0UZuTxQDCT jiiIcFVXeV5lbVVI0HXhz6XLI7YuxqoqeGH42A7mPEOdCwe4ZTD2r6C3rkBGw2Rmix Iin+VoK8BZsup+gJ7Ztbvox5N4vfCEZXh4WfvCGsT4Og2ha48qhvoKgEnVFaC5oH8Q 7UYIDJzbV39+W/nE2v1zSPRA1OiEy4+rRSOZ06UXDdGhKNT9aSu5k1J8V76uT/xyxc nx6g4XHB7NoNw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Thu, 10 Sep 2026 07:18:41 -0700 Message-ID: <20260910141849.170896-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910141849.170896-1-sj@kernel.org> References: <20260910141849.170896-1-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: 8bit Update DAMON kernel API to introduce new DAMOS core filter type, PROBE_HITS_WSUM. It will allow API callers to describe the DAMOS action target regions based on their probe_hits weighted sum. For describing the filtering target weighted sum range, add two type-dependent union fields to damos_filter. Signed-off-by: SJ Park --- include/linux/damon.h | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/include/linux/damon.h b/include/linux/damon.h index 871d26adf6ae5..ef99ff778ae10 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -399,14 +399,15 @@ struct damos_stat { * @DAMOS_FILTER_TYPE_UNMAPPED: Unmapped pages. * @DAMOS_FILTER_TYPE_ADDR: Address range. * @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target. + * @DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: probe_hits weighted sum range. * @NR_DAMOS_FILTER_TYPES: Number of filter types. * - * All types except &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET - * are handled by the underlying &struct damon_operations as a part of scheme - * action trying, and therefore accounted as 'tried'. In contrast, - * &DAMOS_FILTER_TYPE_ADDR and &DAMOS_FILTER_TYPE_TARGET filters are handled - * by the core layer before trying of the action, and therefore not accounted - * as 'tried'. + * All types except &DAMOS_FILTER_TYPE_ADDR, &DAMOS_FILTER_TYPE_TARGET and + * &DAMOS_FILTER_TYPE_PROBE_HITS_WSUM are handled by the underlying &struct + * damon_operations as a part of scheme action trying, and therefore accounted + * as 'tried'. In contrast, &DAMOS_FILTER_TYPE_ADDR and + * &DAMOS_FILTER_TYPE_TARGET filters are handled by the core layer before + * trying of the action, and therefore not accounted as 'tried'. * * Support for the operations-handled filters depends on the running * &struct damon_operations. @@ -420,6 +421,7 @@ enum damos_filter_type { DAMOS_FILTER_TYPE_UNMAPPED, DAMOS_FILTER_TYPE_ADDR, DAMOS_FILTER_TYPE_TARGET, + DAMOS_FILTER_TYPE_PROBE_HITS_WSUM, NR_DAMOS_FILTER_TYPES, }; @@ -434,6 +436,8 @@ enum damos_filter_type { * &damon_ctx->adaptive_targets if @type is * DAMOS_FILTER_TYPE_TARGET. * @sz_range: Size range if @type is DAMOS_FILTER_TYPE_HUGEPAGE_SIZE. + * @range_min: Minimum value of range arguments. + * @range_max: Maximum value of range arguments. * * Before applying the &damos->action to a memory region, DAMOS checks if each * byte of the region matches to this given condition and avoid applying the @@ -450,6 +454,10 @@ struct damos_filter { struct damon_addr_range addr_range; int target_idx; struct damon_size_range sz_range; + struct { + unsigned long range_min; + unsigned long range_max; + }; }; /* private: */ /* List head for siblings. */ -- 2.47.3