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 2513939023A; Tue, 1 Sep 2026 13:13:35 +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=1788268416; cv=none; b=IQYpHPjbjJ8OKzF8Be3QEj3OoTzEZVjZx0uLYYsO60dfcXSW2SSHPzP1x8Rlx0RaXGSMiaEwKXnXMTPp7HNkr4ZjaOxJAb+lexMTd6BN4NJS17U6NSFxiBAWqSy6e6+v/1B7tPJMfL7s4O/55MKeAW4BQdEFxJlmJhfi14tyHt8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788268416; c=relaxed/simple; bh=DvkDdHq4iHzr8I4BpnauinuiWMfL9IXhZr+IdV54oVQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JVyQ74X5o0TiAgbZ60etRcK//SNALB8K726Gm10TaS79t31FDrLnkRT/gCE6UD5/SRgRqlSs76OD51JMr4IMrAwx9KLz6siz1VqFi0qcKXSmchf93S+1k/0uOOkJupLnSnVoxCIJWWmeH4gI85dQB/Yl3pi6+ZAQmRko+XE6Y1w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YMO3erO1; 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="YMO3erO1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6DD61F000E9; Tue, 1 Sep 2026 13:13:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788268415; bh=bvNMg4+ohXrFj0RX6YNja673VETP6Qf2VRqwotq06F4=; h=From:To:Cc:Subject:Date; b=YMO3erO1hgqSNyjhZpaWKn6S/jtbTPvOqsAd1zgh2s/4gKJthLl4cJJmmS3oQUTPA kS1WDuVwssqIByTypa31c8WlRKjzRfgMsTCu5r7KQIiJJvFk2xsq0n3No49nr1DRsK rEWtEvCxwPOzm6Z2UI+81nrd7gv7SmAHYOiqS1+eO63I6d9E5Tcl3GPxU8pyLnIRIr 04hqNgBf28sx2e/OblVrdm+EWccJvG1c7hVpW6BER1uXUZ97zjiOU6RfN0snC2hcq4 UIo0ag50bu9/nE/BWDi5pecqeH5GwA9jaZ8yTvJNuQaszUkZrCqjge+uwNralc0fhS UfQTKswq3bv7g== From: SJ Park To: Andrew Morton Cc: SJ Park , stable@vger.kernel.org, Usama Arif , Yueyang Pan , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 0/7] damos_apply_scheme() splits a region and apply the action to the Date: Tue, 1 Sep 2026 06:13:17 -0700 Message-ID: <20260901131326.97615-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The user impact is not critical. The failure of damon_split_region_at() is unlikely since it is arguably too small to fail. Also DAMOS being aggressive is limited to the single region. Users can set min_nr_regions to set the maximum size of each region. If it is reasonably set, the transient overhead shouldn't be critical. The issue was discovered [1] by Sashiko. [1] https://lore.kernel.org/20260718171523.87547-1-sj@kernel.org SJ Park (7): mm/damon/paddr: respect folio end for DAMOS_STAT mm/damon/paddr: respect folio end for DAMOS actions except STAT mm/damon/vaddr: respect folio end for DAMOS_STAT mm/damon/vaddr: respect folio end for DAMOS_MIGRATE_{HOT,COLD} mm/damon/core: handle extreme memory state in damon_get_node_mem_bp() mm/damon/core: handle extreme memory state in get_node_memcg_used_bp() mm/damon/core: handle extreme memory state in get_in_active_mem_bp() mm/damon/core.c | 15 ++++++++++++++- mm/damon/paddr.c | 8 ++++---- mm/damon/vaddr.c | 10 ++++++++-- 3 files changed, 26 insertions(+), 7 deletions(-) base-commit: d93d8b0181065f8375af61e3a18bbc7c066a8159 -- 2.47.3