From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lgeamrelo07.lge.com (lgeamrelo07.lge.com [156.147.51.103]) (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 DADE93B27C8 for ; Wed, 17 Jun 2026 06:10:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.147.51.103 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781676625; cv=none; b=GhBFxSj+7VjpNioni+btRRrzRdE5WXZtz8sFhI2YYcqBB9M7ReAg+vSTuThW8CX/4bnrGmZZ4eot9S7iccEbAibxlMO+z86M4bnHgUmrqB1xXrE0249FkKF5WOvgMJ7RZGgXvDF5jPOFXD96jHTKzgXxrETtMCwEjSLzm8ZAwV8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781676625; c=relaxed/simple; bh=tQ1F140yU92zZOzRpzYu4UDTbBRUfAVELBtgf1k0MGM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Oq2MdL77UeVqd8tbhyxpklFZ3EA3dIvuvxB32DXLd9ruGMQpIUKhp4IHz8CF94TQMxUDusXAxLSA3O5mxHUuh9YMGnfC1bfN+3RhF4q3JeCoRe9HV0SFUn0ujVivrxarl4452Y0tSlw2KOTIqh5TQZ7yJPGKWArSiuyLtV48ap4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com; spf=pass smtp.mailfrom=lge.com; arc=none smtp.client-ip=156.147.51.103 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lge.com Received: from unknown (HELO yjaykim-PowerEdge-T330) (10.177.112.156) by 156.147.51.103 with ESMTP; 17 Jun 2026 15:10:13 +0900 X-Original-SENDERIP: 10.177.112.156 X-Original-MAILFROM: youngjun.park@lge.com Date: Wed, 17 Jun 2026 15:10:13 +0900 From: YoungJun Park To: akpm@linux-foundation.org Cc: chrisl@kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kasong@tencent.com, hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev, shakeel.butt@linux.dev, muchun.song@linux.dev, shikemeng@huaweicloud.com, nphamcs@gmail.com, baoquan.he@linux.dev, baohua@kernel.org, yosry@kernel.org, gunho.lee@lge.com, taejoon.song@lge.com, hyungjun.cho@lge.com, mkoutny@suse.com, baver.bae@lge.com, matia.kim@lge.com Subject: Re: [PATCH v8 3/4] mm: memcontrol: add interface for swap tier selection Message-ID: References: <20260617053447.2831896-1-youngjun.park@lge.com> <20260617053447.2831896-4-youngjun.park@lge.com> Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260617053447.2831896-4-youngjun.park@lge.com> Sahiko review https://sashiko.dev/#/message/20260617053447.2831896-4-youngjun.park%40lge.com I think this might be an overconcern. In normal situations, cgroup delegation is strictly under the administrator's control. Furthermore, if a user already has a delegated root, there are numerous other ways they could potentially cause a DoS attack. Therefore, I believe this doesn't need to be modified.