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 3CB083C8705; Sun, 6 Sep 2026 21:05:22 +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=1788728723; cv=none; b=c37zQRV+ZhzcCO2ZPY+jSNDdoHqP+mOISstBF/pEuVQVTD4xyN0gCr2C93LMXpm3DnnBOfbmhnAbQW54ETmV7uH3TldTLlBi/5k6nqTaH5qncHEY3i1paCkUP2uV/aaXEdN0K7MtxXdB1jBPuihQI7yLWNznw6faTqHt5EjdGOQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788728723; c=relaxed/simple; bh=64A8eSI2cMClOGz3kyZmsTmWzNg+K9bSbEyPFRmR49E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TMBfshzTUWVW+GeBZsKglGvMcBuMc98x0vcfUqkUKeLIJ9zES8m4ay1ycpxhTNiHTFgKN3bcwM3DIArFADuHTyUHkuiV/XIBECEp+daptL8f/bth3Y+qc4CTwkAdpw5jOMiLwWTlOykyfM8B7yDTeo2pMvq7bFQQaKanJazLZ68= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Hev5VWS0; 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="Hev5VWS0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0091E1F00A3E; Sun, 6 Sep 2026 21:05:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788728722; bh=enJ6Ikb+xyWqp47h1SJ/IEbgrZU8ueGVdQgMTNLWdsg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Hev5VWS0XGTr1CiIZQoRlNatCSnZKU1ZWGfV/gemtU6nYfmgwkNgdevPYhOdvcIft H7WX182R8g6uqDQqJ2JNNIIDkqUmr5H8zR5GXjpbQfbeubTqJgfgo075kzWjAk5m54 jwwTumD/XDhtMuG4+OZpfRdWycm/Klu5RgNX1TNe0PAuibTmtbM1ahTEgPkseH+2Nt psK496Zlj8G8fu4R54TzMKogl2xswfhdYZX9ejbf+KOnkXKDoG1lo76zoG+Qs+eN8K tPLTvXxJB8TBgdfuzBAX6dyppUx0YiORIyz31qzZaZgKIjx7rzzMNvxqq6ao8nf07s aO6mZyYOVDKpA== From: SJ Park To: Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 1/6] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Sun, 6 Sep 2026 14:05:07 -0700 Message-ID: <20260906210513.106895-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260906210513.106895-1-sj@kernel.org> References: <20260906210513.106895-1-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 | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 871d26adf6ae5..59d57131d8327 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -399,6 +399,7 @@ 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 @@ -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_mx: 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