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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763148954; bh=Q1O4BIVR1FCS7fU5WDAS+HptHA2cmt8TA5K3Q3jWw3Q=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=Dj5HqMWkFNbuohcjbv4dicuiDeZh9VXlrv4Nq8qQeqKJfLexZPY2HiN/CaXHOqLbs xsPClbHS3mTj0znKO+cynJD/nzJ1g3VtC1sRbQ5BZg8keXFC6PTtm07C9PEfRwfgID 9eQrI9Lgcfl4RcBrYMTj5Gxf8uCMx2ARWuSmLOp8indblWHrJwTNgBuho0KBn+0PHu +yVFF9a1HKePZGlxXLWtqBRbi5qco9Y3hFVgdIMcgnLFjI38tialKDlHkQ8ynjQMux grCYboOy1/R63jsDHZkcqmVY0m1TeO4Xvov+J/If6GUxuOUgBxayskyv16HXgznSbP Y3uYfZM3JAT2g== From: Pratyush Yadav To: Pasha Tatashin Cc: akpm@linux-foundation.org, bhe@redhat.com, rppt@kernel.org, jasonmiu@google.com, arnd@arndb.de, coxu@redhat.com, dave@vasilevsky.ca, ebiggers@google.com, graf@amazon.com, kees@kernel.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH v2 13/13] kho: Add Kconfig option to enable KHO by default In-Reply-To: <20251114190002.3311679-14-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Fri, 14 Nov 2025 14:00:02 -0500") References: <20251114190002.3311679-1-pasha.tatashin@soleen.com> <20251114190002.3311679-14-pasha.tatashin@soleen.com> Date: Fri, 14 Nov 2025 20:35:51 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Queue-Id: B015D100012 X-Rspamd-Server: rspam07 X-Stat-Signature: rnfw5mo6ug4qtusq3o8cgaezkwhyiff4 X-Rspam-User: X-HE-Tag: 1763148955-976058 X-HE-Meta: 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 xIPCMCXR Cf9HonT0LoMrvuvMzUggKzb0uKuIKnLMuMHf1M7CZRlnaYvNBFM4FfzjOQu7coCq8nEgqpxgbkK76w2gJGjMqrmc13orjRa3NwWznZOxKzFmFvvl86kdJCEE3WjyW+C7P298hFqL2hrh01KNfPa0FTo2Jq3B455vouXTdQMqRb0mLPvCQgAa7KBl2HPUOUV8Y/MoJoSw4lmQgmbn5ILV7HoDVAivVshCNvvVSSzooid0cbWx6I6GGGedW+l/IF2BOTkKt 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 14 2025, Pasha Tatashin wrote: > Currently, Kexec Handover must be explicitly enabled via the kernel > command line parameter `kho=on`. > > For workloads that rely on KHO as a foundational requirement (such as > the upcoming Live Update Orchestrator), requiring an explicit boot > parameter adds redundant configuration steps. > > Introduce CONFIG_KEXEC_HANDOVER_ENABLE_DEFAULT. When selected, KHO > defaults to enabled. This is equivalent to passing kho=on at boot. > The behavior can still be disabled at runtime by passing kho=off. > > Signed-off-by: Pasha Tatashin > Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav