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 B3C12384CD6; Mon, 7 Sep 2026 17:12:26 +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=1788801148; cv=none; b=H/efMwTiPS+Ja+3wp+SGjgG/R6Dnd0aRCnV9z+Cs3N5XDu0biYXta4ZO0YEMHcNKUfVudHMK9xRWP/5aJbahz1fWTYKqZyBeLWqCexxWgGEWCg/NV/GKYdBisAhTgTTKJxeHIx+UlP8hlJWqiG4Y7mLnbb8sh8MwR3EjhXK/s3c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788801148; c=relaxed/simple; bh=Vrm/rC8iyoCJls6/si6QOKjWbYp5ai4d/l+ukMOE65A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IsluWbKu2Zi1ojIVEXRLIF+xrhXEORx3RYHNBszvGdO/6+D85I7GbCkP3enJ0seMo/8YWobsgZylaW2mAnOvLgp++zWo4NfmpN4LVaYkL9y+UphlUVVhFhWDgH6EeQNAOEF38AXw84/mOcILjd6OcXZt8V1+oTngkG8z5GKggNo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kC4AxmPQ; 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="kC4AxmPQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 552B81F00A3F; Mon, 7 Sep 2026 17:12:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788801146; bh=lU6Anck8dGcwHo6Zz1AH/wx0RCbpjIZ1+t8NQz+I98U=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=kC4AxmPQiOZ3aJ+kyB9vrnbNxo6iJlrY/iUYv1AXldMH4C/fJN36qQrI2ES9RCnXE SQFcvPOjzZlAdzrkPSsR0vsHmP13qCTg/bm8g4IbjuJ6optJOOgxqEIVbFjwScHaJ0 GmxsBnmUi8ewFCxfkyiuQ7/2FGOYMF+zaduMew5hsmbZGgP/kuK6oWjbzkHGl19yxU uJu9HlasDNMRUoxYy3G1mU6wL/ttmYQyoIxLNjyW4OswjL2/lZDFxNaTN4Gr2npOBk c6BFdAAbvggDGBZ7v/TOEMJ1ovF+cnMCo1UODwHrVWVH0ZlV5a7c0mUgB5/QxiiIkg 34yqqnFgQwzvQ== 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 3/7] mm/damon/core: support probe_hits_wsum damos core filter Date: Mon, 7 Sep 2026 10:12:12 -0700 Message-ID: <20260907171218.101430-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260907171218.101430-1-sj@kernel.org> References: <20260907171218.101430-1-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 30af5bbcc90e7..98efc6e2876f4 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