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Sampat" , linux-mm@kvack.org, linux-coco@lists.linux.dev, linux-efi@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, ardb@kernel.org, akpm@linux-foundation.org, osalvador@suse.de, thomas.lendacky@amd.com, michael.roth@amd.com Subject: Re: [RFC PATCH 2/4] mm: Add support for unaccepted memory hotplug Message-ID: <20251128113411.GAaSmIs0kSWGhCYkaA@fat_crate.local> References: <20251125175753.1428857-1-prsampat@amd.com> <20251125175753.1428857-3-prsampat@amd.com> <66ylzwknm4ftd6utn3nqr63jmhl2ccvcdvyi5fechfnvmfxivu@37pckhjixayh> <20251126223127.GIaSd_v7juUkaW4RTA@fat_crate.local> <20251127181233.GBaSiUkaLzwANS_6WT@fat_crate.local> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Stat-Signature: dw47jax83em5f1qdr4pbuotfebq5meby X-Rspam-User: X-Rspamd-Queue-Id: 6252B180013 X-Rspamd-Server: rspam09 X-HE-Tag: 1764329682-872467 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Nov 28, 2025 at 10:30:15AM +0100, David Hildenbrand (Red Hat) wrote: > kexecing the same kernel is typically used for kdump purposes. > > kexecing different kernels is used for all sorts of things (live-upgrade, > grub-emu come to mind). It's quite common to kexec different kernels, or > maybe I misunderstood the question here? And my question is: since when do we enforce no-ABI-changes between kernels so that we can kexec any kernel into any kernel? By that logic I should be able to kexec 5.x into 6.x. I'll bet some money that it won't work. So unless it is written down somewhere, I think we should probably talk first what we want to support and why... Makes sense? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette