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 F1CD031195B; Fri, 11 Sep 2026 01:13:41 +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=1789089227; cv=none; b=G0XhZjbqLjThA73wvDGRp8EiPZG3ZlJxbRkBQk82yuSCAmsii5WEhjHiLj1MooEx2NoKLgem3+gLSl6nDRjC75gcJaGCLEukOldTH+co3jehlzU9LIbbUZEDWTAuoIbInONe58UNR4ryGDYZBgLOZZ2qyqQhTGurwZlxQ8+u6gc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789089227; c=relaxed/simple; bh=/s5M0my2VRrF4bdGS8mHHWAW5UTy+skM6R6wa2GBleg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Yodu2oZzZu++7ggUEWvC//tPq1hiqIgVsyxzH7msHeTNrCgQvuRr/Ntvhk8HdD+k1Lqz+TcprWtQEJx8XDeXgiUAVXZwaawTbS0/VSbxTRJpE6eNaqgcS7zYvE98jg/wX+B+12KyZpBkZoOvKKvdLuyJH/hN6FkVEYuERXeIbQg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bwxpBJKS; 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="bwxpBJKS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 013021F00899; Fri, 11 Sep 2026 01:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789089219; bh=b57SpIkbZ6AMBsE6RM4G3dlGWMR1DXMsNf+oP0yvVfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bwxpBJKS/QiinPaLXeMhuqncGlUqStkYv7JTJwV4RsBGPZNogMbgdim4vQj3rK+VV Ag41Px4bbwivRlpnWqciRr45S8GOgbkuG9E+8s/8ks6MUVHTRdQyotvMpMaa6px9Cz zJIsfcwL6XRAWFdKd5TdWXBiKn/Ci5RZPyqJRtXq1XLcVrj4cw2Xjp7EAwZy7XdSsW wBpmxYxaVNsRPJF5RK3Dr8ZGlES35uDwSRewLWIrBSDP2Eox6RMW8KsnHb7oAiYoUW 0iuHM+T3XKVD9eoYhh6vC6HrP+TMt3nJtIAL4qIEZwC0/pxl9K6BPgNweLOFbJCy2w 1OOXsTzxWoM0A== 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 v2.2 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Thu, 10 Sep 2026 18:13:24 -0700 Message-ID: <20260911011330.93678-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260911011330.93678-1-sj@kernel.org> References: <20260911011330.93678-1-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 50e0f9407db2b..0c98f7e267d07 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -658,6 +658,7 @@ 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; @@ -1332,6 +1333,10 @@ 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; } @@ -2510,7 +2515,7 @@ 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: @@ -2545,6 +2550,11 @@ 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, true, ctx); + matched = filter->range_min <= wsum && + wsum <= filter->range_max; + break; default: return false; } -- 2.47.3