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 020AC3659F9; Thu, 10 Sep 2026 04:03:27 +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=1789013009; cv=none; b=MnN3MJXFfgi/pRKWwMipxqz1zhz3dVlIM/8kyyCowY+MVeBke2HqP/85XKOYiHsPg4ahwPQRfn1jpQb5FYMNUG9aS5jO2gs9Q0ecRYCczLoK954x4YWScIu1ubMRAsQeoYI1evds4mdmA4G5o06unb1YLuvkp2zzvDEjzD3Fqqw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013009; c=relaxed/simple; bh=Y1BNgJTPI/nQKjFvvasfGPi5MdMWj2Yvyi9brUFOviM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OtFm4KgD9vThDtbylAilELPJKC3hNczKZEbCvcWTxElmaZPw3CtW6iWU7uPMXG1rkyAkh5K4FQecIA8iIvSnAmXuPfWUtMTHe3Juwyl3UIyas2okg62N8FdCbTFZXZWV4srdqC5+QddSzz2DnqsEzy0rkdu7/m0M4GrXZuK2CFo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bED307cl; 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="bED307cl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ADEB61F00898; Thu, 10 Sep 2026 04:03:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013007; bh=Dxxa5wP8u6+NzrCeSUKIx091CaUINS3Abxx04SVxcHc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bED307cl2sGFNZVAYrK7mZrmuxaml4iPTXDqeapjKFViFL6kmH3sQRTJl48Z2odWI 1oagjsJAHT9Y6CP7yw3k4mXNKxeSXFoBneEroJgN1yvmRAdDFEvNrLOCCXgQPS7Cck M62s6v0bEiSxmCqFp4uXuaBlIaB1SqJkBtGBfZ748kk9eRqeOi0Pmmvv0E54rs0880 jBDhMU2UBBsFojRmjOECPuo3BOM9gnvpHUMBgKumhvcblwRI3XBzC7P6Az67p9262S JTef2bK8K4zy5vQz27rxJm6svm1tlMW3+noOsjhIl2x1S0niNHa9ePrVGItZReqzO4 M5bZd8U18EsIQ== From: SJ Park To: Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.1 1/7] mm/damon/api: introduce DAMOS_FILTER_TYPE_PROBE_HITS_WSUM Date: Wed, 9 Sep 2026 21:03:12 -0700 Message-ID: <20260910040319.147037-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260910040319.147037-1-sj@kernel.org> References: <20260910040319.147037-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev 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..1deda16bb70b5 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_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