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 925F436E46C; Thu, 10 Sep 2026 04:03:28 +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=u+Qow+vqI8NpDVjDmtBB1HARKduiWEy7NWu+d3Bw9/DitgRbuEcod5j0GLsBXr/Ia4rsNqqnl/FMRUCG5LzpjpfEjNi3/JlBR2zQVUkSlUL6dKeGd2ppALPpFF4jQq9vnQwbGLaCPkWSe9pwhhis+D52k43p0/S59H61wDEudxE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789013009; c=relaxed/simple; bh=/s5M0my2VRrF4bdGS8mHHWAW5UTy+skM6R6wa2GBleg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lGwpFir9g11jhFdfd2JRjs8+vt24uE49m9iamgE0t2brF80zQCscuYOa5mtyn1a86qQxTEGyAc1NHAtTfywqhZMN/D6mUpTWrbKyrkGNu0zUthmfxIqcFgL/9PTFjB1RE/phF7ShiDJahmH5tTpmdSrHZiFq/JkaUEVPUeiNBMA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iuAe1Q0Y; 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="iuAe1Q0Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D1A51F0089A; Thu, 10 Sep 2026 04:03:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789013008; bh=b57SpIkbZ6AMBsE6RM4G3dlGWMR1DXMsNf+oP0yvVfg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=iuAe1Q0YUHJimYcpz18LK6OjYduQt4A9/RkIC4nCX5SUrQ/xXI1A5ah8/fTFhs2nv qSCIGjcGC/gtG7gBvdVZO6/Z2I3ZnvCz5FINszIOgN/QC3r7x4goXa5Gfz7yAZoB3s dFsPQ3qFss+48nKU1mbn5RBBe8m+0KcYTVNV2myFIxKzLNpi2uY55MX887aWyAn0ef loW/QBfP4RckCvfZsyhnIi6F40Pl1X8aCAVAtraGZsizCn0ZPMO65FDaEQ6KJOdD7Q OktxLiAbHM5nL95lPb8v+6/BKUx/WqeuZX1qar8Z2xhwe0RaOHXO4yuGf3Zo8jtH6d 2IM4hAdMjfveA== 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 v2.1 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Wed, 9 Sep 2026 21:03:14 -0700 Message-ID: <20260910040319.147037-4-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 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