From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E70C9395258; Wed, 14 Jan 2026 10:49:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768387765; cv=none; b=M5B7IeIn5zUZvlSItkA3bEinLAUlxrJgPLxx4GfkLTnz4YZz8zpPjKGlpmsu14j+wBomCME111UKua/ae0dt6N3vWdmdYyFpCe4r0Nc2qmgy801pis1qu13bnE/Xn6glGe/CFOjAIfpjczLvY2YVQ5D/11/sQpN/+zNrOX6BRIk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768387765; c=relaxed/simple; bh=79/0LC4XFZkQa9FcixVBMSelu5diVWBx5HiiyCfVe6U=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=eP7N36P6al43IWJpohJyejZhubbu5/0A9LJsnpq0D52D18lRLL3pm+Unu3+apHx+F6zhQunhHtymNMnl3/+mz1Idqq+5u7C3ws9WgbwD12dvc/Lb/GAlWhsuNph1BtzoNreMOnaGSGzufMmbzDIVmRIQCL/HhpP0NBvlfaCFU+Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZalrBIh+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZalrBIh+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E45EFC4CEF7; Wed, 14 Jan 2026 10:49:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768387764; bh=79/0LC4XFZkQa9FcixVBMSelu5diVWBx5HiiyCfVe6U=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZalrBIh+6TpqN7ymyXJCpyYRdW7dF3W8SHHJm8rtm4xILFsYOGZ1dYTT0+5OJuITx FAF+b88uA8O4ghuRa0FYLpUH2HMkIDWp1zQ/wH4dWLTzXl/f52M53Weh7lUAJIUtYd QIMO8H4LcGaYyDDipdBsn+13+EA9Yo594MvVJ4PkMk9/i8hwn1re6TZKqRuFLDLieF b5CbUtqCpzlGAVDLThfdkLSY9Q0nU18U6jHNb6C2aeg2fMgX5W6xEy+xTduL1NPwVv /xYDwlwS6XmoV8fvratJYauAscLKY/ixlIzEJjty50BxwlgRFyRxAkk0hmF4Hk/F5m n36k2s8+S77vw== Message-ID: <6a9db6ff-2fe8-4be6-baba-7db7913898f2@kernel.org> Date: Wed, 14 Jan 2026 11:49:19 +0100 Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 4/8] mm/memory_hotplug: return online type from add_memory_driver_managed() To: Gregory Price , linux-mm@kvack.org Cc: linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, kernel-team@meta.com, dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, osalvador@suse.de, akpm@linux-foundation.org References: <20260114085201.3222597-1-gourry@gourry.net> <20260114085201.3222597-5-gourry@gourry.net> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 1/14/26 09:51, Gregory Price wrote: > Change add_memory_driver_managed() to return the online type (MMOP_*) > on success instead of 0. This allows callers to determine the actual > online state of the memory after addition, which is important when > MMOP_SYSTEM_DEFAULT is used and the actual online type depends on the > system default policy. Another reason to just let the caller handle MMOP_SYSTEM_DEFAULT itself by calling mhp_get_default_online_type() :) -- Cheers David