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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20b86ced-7c47-02ca-0e0e-1bd5d6cc95c1@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: virtio-dev@lists.oasis-open.org, linux-hyperv@vger.kernel.org, Michal Hocko , linux-acpi@vger.kernel.org, Baoquan He , linux-nvdimm@lists.01.org, linux-s390@vger.kernel.org, "Michael S . Tsirkin" , Dave Hansen , virtualization@lists.linux-foundation.org, linux-mm@kvack.org, Wei Yang , Eric Biederman , Pankaj Gupta , xen-devel@lists.xenproject.org, Andrew Morton , Michal Hocko , linuxppc-dev@lists.ozlabs.org, Dan Williams , Pavel Tatashin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 30.04.20 13:23, Dave Hansen wrote: > On 4/30/20 3:29 AM, David Hildenbrand wrote: >> Currently, when adding memory, we create entries in /sys/firmware/memmap/ >> as "System RAM". This does not reflect the reality and will lead to >> kexec-tools to add that memory to the fixed-up initial memmap for a >> kexec kernel (loaded via kexec_load()). The memory will be considered >> initial System RAM by the kexec kernel. >> >> We should let the kexec kernel decide how to use that memory - just as >> we do during an ordinary reboot. > ... >> - rc = add_memory(numa_node, new_res->start, resource_size(new_res), 0); >> + rc = add_memory(numa_node, new_res->start, resource_size(new_res), >> + MHP_NO_FIRMWARE_MEMMAP); > > Looks fine. But, if you send another revision, could you add a comment > about the actual goal of MHP_NO_FIRMWARE_MEMMAP? Maybe: > > /* > * MHP_NO_FIRMWARE_MEMMAP ensures that future > * kexec'd kernels will not treat this as RAM. > */ > > Not a biggie, though. Sure, maybe Andrew can fixup when applying (if no resend is necessary). Thanks Dave! > > Acked-by: Dave Hansen > -- Thanks, David / dhildenb