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 6F1B72D7388; Fri, 21 Nov 2025 15:55:50 +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=1763740550; cv=none; b=GMHJaItxB8RdYTSNc4f257AUn4iAeHeEUeRYCyocrRCtSZ3zspzULG350KzMwKeqxHP3X3UP6A9oSdxZA5R1myXoJ+w0759N2TBBCNbG9xNwPBfKJoiA/RTb5FHfk6gS/eZK3qtk3NmAh3gmN4jfK7coGIWLNGy/Lwrus1JKUww= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763740550; c=relaxed/simple; bh=8K8v4Fqc1uPGUBC8powdKMrR3iKxfMCptCFO6IAuuh8=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=Wl6Kjm5skMl2WSIfnjlGhj+NexQdpMan5u3VoL/BZQ2h603A1UmKMYEDtMFfC6znmIqWck+7tuqzSBq5XZnywGwTGkPlQj+D2ZC0Dok36xsoaTDaKjh2VZFTS4IGx/L88DwWQ9ho1/FbC6H+PFkY6IWKslRiyxNT/V856Orkxyo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WES5sOMj; 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="WES5sOMj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03F28C4CEF1; Fri, 21 Nov 2025 15:55:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763740550; bh=8K8v4Fqc1uPGUBC8powdKMrR3iKxfMCptCFO6IAuuh8=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=WES5sOMjmeBJGZu3nYtoQyB/m5dAzcI1PJuJTRFO/cQh1YV4bi5dSqlMG49+TkMWQ 6FvKh4HBeQE3QxPBe5mw/rXyTiMb3cVq7HGL63h/lRTHjmv8SuCYviUw5oMCb5qq5E 0E+wJACBqr/CzkdoUnErDHRT7Tg4hrVh03tbKuHi/Ql3dNMLlcIxoTjn6q0NSEuDTm oiaf2kQYhlZXogOQGlGhRolF+d4xYE4eZ7588U0oURn5bcn7SCd1bicigyv4ENdImD iyiZ315qFHzYMbuvr986pS9db9FLhsPyPXvC0M+qREcI1bRi7VidVVZlhHaHpiNXVM 69dMJFY0/3BTw== From: Pratyush Yadav To: Pasha Tatashin Cc: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, rppt@kernel.org, dmatlack@google.com, rientjes@google.com, corbet@lwn.net, rdunlap@infradead.org, ilpo.jarvinen@linux.intel.com, kanie@linux.alibaba.com, ojeda@kernel.org, aliceryhl@google.com, masahiroy@kernel.org, akpm@linux-foundation.org, tj@kernel.org, yoann.congal@smile.fr, mmaurer@google.com, roman.gushchin@linux.dev, chenridong@huawei.com, axboe@kernel.dk, mark.rutland@arm.com, jannh@google.com, vincent.guittot@linaro.org, hannes@cmpxchg.org, dan.j.williams@intel.com, david@redhat.com, joel.granados@kernel.org, rostedt@goodmis.org, anna.schumaker@oracle.com, song@kernel.org, linux@weissschuh.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, gregkh@linuxfoundation.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, rafael@kernel.org, dakr@kernel.org, bartosz.golaszewski@linaro.org, cw00.choi@samsung.com, myungjoo.ham@samsung.com, yesanishhere@gmail.com, Jonathan.Cameron@huawei.com, quic_zijuhu@quicinc.com, aleksander.lobakin@intel.com, ira.weiny@intel.com, andriy.shevchenko@linux.intel.com, leon@kernel.org, lukas@wunner.de, bhelgaas@google.com, wagi@kernel.org, djeffery@redhat.com, stuart.w.hayes@gmail.com, lennart@poettering.net, brauner@kernel.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, saeedm@nvidia.com, ajayachandra@nvidia.com, jgg@nvidia.com, parav@nvidia.com, leonro@nvidia.com, witu@nvidia.com, hughd@google.com, skhawaja@google.com, chrisl@kernel.org Subject: Re: [PATCH v6 03/20] kexec: call liveupdate_reboot() before kexec In-Reply-To: <20251115233409.768044-4-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Sat, 15 Nov 2025 18:33:49 -0500") References: <20251115233409.768044-1-pasha.tatashin@soleen.com> <20251115233409.768044-4-pasha.tatashin@soleen.com> Date: Fri, 21 Nov 2025 16:55:39 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Sat, Nov 15 2025, Pasha Tatashin wrote: > Modify the kernel_kexec() to call liveupdate_reboot(). > > This ensures that the Live Update Orchestrator is notified just > before the kernel executes the kexec jump. The liveupdate_reboot() > function triggers the final freeze event, allowing participating > FDs perform last-minute check or state saving within the blackout > window. > > If liveupdate_reboot() returns an error (indicating a failure during > LUO finalization), the kexec operation is aborted to prevent proceeding > with an inconsistent state. An error is returned to user. > > Signed-off-by: Pasha Tatashin Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav