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a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763743530; bh=uKqlbpbWZRrKvI6snBLWA76JEhH3myl0WqefytuKsNo=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=IBw8L3QSRDawIjSxvYdXP68CTt2ce590ZJcwdoZ2Jijz94Ey+jenn+VooM+tMuzu/ 7OY/Y7/5mFacc9/raDz5D79GRf94kp4F6GGYHzpSCYsv8yU/pXMVEpNmSQ3dubQQns KJdkJP793gTvJ2KdaXNFKVqn2+gL6lyH5xwCh62A51RWLBz3cdk2trhxyizwkcadmF Ulfe9QhNq7K5YhvlwxVwWUctlUnulpiW1hGfgU1Ff1oTa+etifkU80qyZrYhttWcL/ VdDiv06qRZpeFblFV7JecQ44oJ1WIOkZ6IIs+LNwh+K7PYn1nDy7fpSPj1+FKo+oaw 3j6rWfC6PXb4g== 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 05/20] liveupdate: luo_ioctl: add user interface In-Reply-To: <20251115233409.768044-6-pasha.tatashin@soleen.com> (Pasha Tatashin's message of "Sat, 15 Nov 2025 18:33:51 -0500") References: <20251115233409.768044-1-pasha.tatashin@soleen.com> <20251115233409.768044-6-pasha.tatashin@soleen.com> Date: Fri, 21 Nov 2025 17:45:19 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 2EBE1C0013 X-Stat-Signature: 8k1rqmsi1any19kgfh4d4phzijk7uxcy X-Rspam-User: X-HE-Tag: 1763743530-777095 X-HE-Meta: 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 Jtcoec17 q5ZhKbqorQf9vRhy26ehnZWtHzC0WXbwcmAnmAnJIU+XWJphN8cQ1QF0jscPHeFqIXMn9V90KppCxbiW5Qzw7jcT5l+joCi7VktjCaMqAoH4pVbnikDNyvzEOCInQ2JKiTdzzM/HdHfoRw2wzXpuiuXAt4DkrAfdlW/M7LaKuO22SCFiclIl+E7XmaqU7uA2j9uAlZBNwsws1oeHYGAUWIZvS5mC/f9C6xIs30ujq/7bVkLBIEphtgX/B9s9JgdrFqJFa3ACcMysbgXnUME6WAP1GtTcSTiyfBKfihfH/7U64gpzZ4q+82Aiaj01wSBVyNe6VD88ve2oMVs2wm9sp8w2qWUQoaNlsHO7n0+rYM087sARs768pH4Ax3g== 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: > Introduce the user-space interface for the Live Update Orchestrator > via ioctl commands, enabling external control over the live update > process and management of preserved resources. > > The idea is that there is going to be a single userspace agent driving > the live update, therefore, only a single process can ever hold this > device opened at a time. > > The following ioctl commands are introduced: > > LIVEUPDATE_IOCTL_CREATE_SESSION > Provides a way for userspace to create a named session for grouping file > descriptors that need to be preserved. It returns a new file descriptor > representing the session. > > LIVEUPDATE_IOCTL_RETRIEVE_SESSION > Allows the userspace agent in the new kernel to reclaim a preserved > session by its name, receiving a new file descriptor to manage the > restored resources. > > Signed-off-by: Pasha Tatashin Reviewed-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav