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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) MIME-Version: 1.0 Content-Type: text/plain X-Stat-Signature: itfwqz6ny1ne3y9d5894xqy6c6imjkeh X-Rspam-User: X-Rspamd-Queue-Id: CA84C40014 X-Rspamd-Server: rspam01 X-HE-Tag: 1763740551-434113 X-HE-Meta: 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 sB4ZX7ID 7ho3YrMv1Nk8MelZjPMFC2pkgXnl+26+FkVD6ClW5ptVxKjS71qQreUiOpqnea+84ZMWI3ahdhnkZjvaeuYit/77k2y807wyl6asDwOguj3PS5mMYz0QzfTW4BXBVWaLenyfOgSOeuYnavCvKf5blDXCvxSamNOkB/HHHew9ruj9NpGLJGSj9hERxylmdgXETEo5VLboEDUzME/hAgNcjmpUuf3ggWkvjhGkxr52CmTJoSSiDUnq47C/1HZEvlOgu14R/2FtAkeAv72dUxl7VpeHSp5bpnLts0PE+fzDlTQ9ICXb+0FV+SgPSJE1bIwPWQlHLUfvUyvrQprwJg2x8a14gOfC455FHqg5M0UijGZxHWAXAyDmEkd8P+A== 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 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