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 DD1F93C9885; 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=1788728724; cv=none; b=Ej9rkFVNfEQR4JuIyYpyEoTGEz9WwO7OaJOGE90Rx8HkP88jB+lYayiVp/CCyKBBPPDTMJDh9ncj3HBjUXIBzFc7FYO8KCe6vTx9P4b2GhBuaNEuwklyLMqI3hPnT4M+Hj5IsjrlIbMW/Txvp8w3ovpL/cdAYIvpB8vhlebp1Zo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788728724; c=relaxed/simple; bh=tYbGXcb0qnfSN33+x6et/LLdKLw2KZ5gfO/OCyF39B8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZOybj/riWOWyODDflZi990wOClkDinc9gz3Go+L5nLde7Uqahbp9yvPWMKZmfswFCVw+l9/yzWsatb29gFDF3FyjcutuYpQNblxEX6a5kTHA9yk6LwK8OP+Am7CGeMKo11ZaJb/fXQndYn+jwr218BBtVqoU3qO+1K1fc5H+Gpk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QayqpzHD; 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="QayqpzHD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B89F1F00A3D; Sun, 6 Sep 2026 21:05:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788728722; bh=yd4lCB6dTAYrU/arXR8SQcBFL5XuW/pHu+vMb4NXhus=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=QayqpzHD16IlfVZM5Gglq53PCSNrzfSPPbd/9zNKg991mdo3gVo3+lqZew3+JL80o xbm9np+WP9bKdLQCN4yjd2pOHPKfPNHaCmhT/i9OKDcrIEGEzgvIV2bz/cc0GjvU2E lHFShHzmCm5FHEyyb1sHIvTJ3IbHwbodsdaIpQvnzUPhks+Kku7GIw2u1g5Nf+zCte tvChj9oKGJbHJJyXliQdWHeY47mdBYIGLUS0g2gd7QUZvpcWchfCddEwr9ulFabG7Q w5tT2Mukz6ZjIo2YGFrWbAUdfoAhXB1JRUirQuu8H2Al7WDMKYDCUjtBOZ9lnpPpeY Z/p14P9/KCUvQ== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 2/6] mm/damon/core: support probe_hits_wsum damos core filter Date: Sun, 6 Sep 2026 14:05:08 -0700 Message-ID: <20260906210513.106895-3-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 Implement probe_hits_wsum DAMOS core filter support in the core layer. Make three small changes for the support. First, update damos_filter_for_ops() to treat probe_hits_wsum filter as core filter. Second, Update destination damos_filter->range_{min,max} for probe_hits_wsum type damos filter commits. Third, extend damos_filter_match() to handle probe_hits_wsum type filter. Calculate the weighted sum of the given region and compare it with the given filter's target weighted sum range. Signed-off-by: SJ Park --- mm/damon/core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/mm/damon/core.c b/mm/damon/core.c index 1752afede01e2..5b976162c5eed 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -654,6 +654,7 @@ bool damos_filter_for_ops(enum damos_filter_type type) switch (type) { case DAMOS_FILTER_TYPE_ADDR: case DAMOS_FILTER_TYPE_TARGET: + case DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: return false; default: break; @@ -1328,6 +1329,10 @@ static void damos_commit_filter_arg( case DAMOS_FILTER_TYPE_HUGEPAGE_SIZE: dst->sz_range = src->sz_range; break; + case DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: + dst->range_min = src->range_min; + dst->range_max = src->range_max; + break; default: break; } @@ -2506,7 +2511,7 @@ static bool damos_filter_match(struct damon_ctx *ctx, struct damon_target *t, bool matched = false; struct damon_target *ti; int target_idx = 0; - unsigned long start, end; + unsigned long start, end, wsum; switch (filter->type) { case DAMOS_FILTER_TYPE_TARGET: @@ -2541,6 +2546,11 @@ static bool damos_filter_match(struct damon_ctx *ctx, struct damon_target *t, damon_split_region_at(t, r, end - r->ar.start); matched = true; break; + case DAMOS_FILTER_TYPE_PROBE_HITS_WSUM: + wsum = damon_probe_hits_wsum(r, false, ctx); + matched = filter->range_min <= wsum && + wsum <= filter->range_max; + break; default: return false; } -- 2.47.3