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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763297105; bh=FQsIjcze7ny/ihNObILffVz/RZYjdBBVaFrGEHeRaGo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=mVUG98NPrWa2ycrlOR5G9KSRrMXg0exikuWmvqW0pl+wMf5e6gUAXY2/KvUstqKbO wtvi6wt5qqNulwDxLfUPo4BMaCUGq+z2zIwgVh+TRMdnydwcON8f6GBmTRx0l/zAAg UFDQbW14bn1sS9UftJi+0NltKYWS1bKPrnq9qoOJTMZ0Z3VswFK+5dDsP3cbs6/If3 8KPX2wVrR9h7PlZ0VaxG1ow8eQ7qydDhweuVniORdwFwo4ZGBBVTuQ9zdf9U7kqGhc yuxWfZY4ycdPogoX/C/ajzJCOuv/BCJBlXjgiUQuQz9ZAps4c3lpYndqioxuKypmq7 mnOM8YWPrG9ag== Date: Sun, 16 Nov 2025 14:44:41 +0200 From: Mike Rapoport To: Pasha Tatashin Cc: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, 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, ptyadav@amazon.de, 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 Message-ID: References: <20251115233409.768044-1-pasha.tatashin@soleen.com> <20251115233409.768044-4-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251115233409.768044-4-pasha.tatashin@soleen.com> X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: F39B21C000C X-Stat-Signature: m94yo8cu86qcyafkdk9uen1af6wx6hef X-HE-Tag: 1763297106-952969 X-HE-Meta: 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 Omafoiwy u14eLKgEF7ynZ3yKnbLkxdTVmuV8nt2IO/K5PTOlfOITQDtq2FxoC/QmTYvcKNU0S1uk12zqjVXy72HD4oP+1Zh3bb3bQnn/9KLXL88SaLioRdOg1WnThFelx91KtohAIb+VOdQNddwigkyXtynsX4pLGB9FKy574Ul1uW1QVwrLhXg2RXQ33mAEYl1hHFW5nu6UeZhn1Vzqa5jJ1KEbfZh134qJRTDKcvSpbd4pnvxLb/EZMjviY5qr8Gg6u1+YYfrlcf5J3aS/cFGCeLDS0+M+I6GrTrhaeYNEUUw/4b2x99Vv8KCc7rrt9kVoEaiuW4d5duHNIBOOZDxyNBJY4aJqdpwgY6TdMfqic0/J/0EJvYqD61GGrWabam3M9zFmw3tD+62LtUijK9KvWTOe3b5oImOBd/0cPDD2P7qZlyxRW3J04ScD5wwxFSpsZvTU29p+d6SoGz+duEqk8u/8cqvFi/cW4TgVpxS+g3cB/QVrDM0U= 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 at 06:33:49PM -0500, 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: Mike Rapoport (Microsoft) > --- > kernel/kexec_core.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c > index a8890dd03a1d..3122235c225b 100644 > --- a/kernel/kexec_core.c > +++ b/kernel/kexec_core.c > @@ -15,6 +15,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -1145,6 +1146,10 @@ int kernel_kexec(void) > goto Unlock; > } > > + error = liveupdate_reboot(); > + if (error) > + goto Unlock; > + > #ifdef CONFIG_KEXEC_JUMP > if (kexec_image->preserve_context) { > /* > -- > 2.52.0.rc1.455.g30608eb744-goog > -- Sincerely yours, Mike.