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Mon, 05 Jan 2026 10:29:59 -0500 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 9930160010; Mon, 5 Jan 2026 15:29:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4DE3FC116D0; Mon, 5 Jan 2026 15:29:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767626994; bh=bAGXf5PUf6O+f7oKuqhuR5XP6c+ggPAHD0qZHNqJcvk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=tz/2Rvj5Zf90aLyO9aSYRCzBhlrAg0MqG95YXr9ElwW9GT+cjnx4GVZAZIoFHPnrp WX/jjvrl2qC4GFiJTAobcq916yeaISDzCc/laaed+q6fB+KNpZoD0NKZhnPoT/qmcH M4AC0PdXDYEVHf0MfAzKqZ6JIqCPnbJ6O7T7Ifhro7FzMSZrLVyN8+zvbXOGG2nyfB cssK5OZCHOTD7ujLsa0DS94JVVtuqc5I0OOdZVnDGpthrhlGYgDhGlOjhqelTntLvg j5K50GAmr4TG8htHsiJoAuc2FtWJiqVxwMxe+me8aRtCIFO+aTPDo+tTNpvYaR3OfZ bCCKE7oxAE98Q== Message-ID: <1b2acdb2-ad9d-4fdc-bd3b-a13249cc0ab9@kernel.org> Date: Mon, 5 Jan 2026 16:29:50 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 0/1] numa: add 'spm' option for Specific Purpose Memory To: Gregory Price , fanhuang Cc: qemu-devel@nongnu.org, imammedo@redhat.com, jonathan.cameron@huawei.com, Zhigang.Luo@amd.com, Lianjie.Shi@amd.com References: <20251209093841.2250527-1-FangSheng.Huang@amd.com> 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 Received-SPF: pass client-ip=2600:3c04:e001:324:0:1991:8:25; envelope-from=david@kernel.org; helo=tor.source.kernel.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 1/2/26 17:30, Gregory Price wrote: > On Tue, Dec 09, 2025 at 05:38:40PM +0800, fanhuang wrote: >> -numa node,nodeid=0,memdev=m0 >> -numa node,nodeid=1,memdev=m1,spm=on >> > > Should discussion with Jonathan - whatever form this ends up taking, can > we change this from [on,off] to [normal,spm,reserved] and apply the > appropriate types accordingly? > > don't know what to name the tag in that case, something like.. > > memmap_type=[normal,spm,reserved] ? That looks more extensible indeed. The semantics would be unchanged compared to spm=on: only applies to boot memory. Although, as discussed, mixing and matching types per node should be avoided either way. -- Cheers David