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AJvYcCURD7l2LUZOcXKH5aTXwlVewt3yIuUHrgZylfeSHBDrLz6v+JMeMex+WQDHlpfj9k+o1sQFhJZ4bKg=@vger.kernel.org X-Gm-Message-State: AOJu0YxTgila6ziSSYkKgzI0mZEBpmJbXAXDd63qKZRo62xRF7LVYMkS HYhFKHlLqHhCgSYsm5P4zAocp1TmwSXFG2U3Inayi6C2MUxZ285WmSDV5K9HyzEEQoIQH0kfrts sHUTbMp84KWuV/KYcoL+cGyEwVA3fU3GjxV8+BCQlWQ== X-Gm-Gg: ASbGnct4FZbqbBJyCyzgFKTgLY82w2tAkRSz1UEVDKvx65dkMHQZ3vD02pjpvcHDpP0 Gw1zvkGghEkReNpTNTt3hw6cujMep9txNaqsiWDHOY5y8OijIvAG6XXvC3EfkE+3PVGo23P3bmp nztvqiZI2Ot4FBdX8Gv/Frz2IW8gbduVU8haDVUOEdvTKk0L2lT/5RgvwCHL+0bdjmk709RyBXG Sob X-Google-Smtp-Source: AGHT+IH7x6PzB/jpkOPVprK93HcHA2jlE9LSPDmfVuRTuFZ8graOQso5EGuliHqnNQqcqLY5o7Pky9G7peBJC7yYL1M= X-Received: by 2002:a05:622a:286:b0:4b2:d5bf:20a1 with SMTP id d75a77b69052e-4b2d5bf2602mr93874511cf.23.1756234723572; Tue, 26 Aug 2025 11:58:43 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250807014442.3829950-1-pasha.tatashin@soleen.com> <20250807014442.3829950-20-pasha.tatashin@soleen.com> <20250826160307.GC2130239@nvidia.com> In-Reply-To: <20250826160307.GC2130239@nvidia.com> From: Pasha Tatashin Date: Tue, 26 Aug 2025 18:58:05 +0000 X-Gm-Features: Ac12FXzbC4_094zxu3z9fUDRO3yQVd4QdY6g8DyMrUl3RDt_kmv57pEA7HFGGV8 Message-ID: Subject: Re: [PATCH v3 19/30] liveupdate: luo_sysfs: add sysfs state monitoring To: Jason Gunthorpe Cc: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, changyuanl@google.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, zhangguopeng@kylinos.cn, 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, parav@nvidia.com, leonro@nvidia.com, witu@nvidia.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Aug 26, 2025 at 4:03=E2=80=AFPM Jason Gunthorpe wr= ote: > > On Thu, Aug 07, 2025 at 01:44:25AM +0000, Pasha Tatashin wrote: > > Introduce a sysfs interface for the Live Update Orchestrator > > under /sys/kernel/liveupdate/. This interface provides a way for > > userspace tools and scripts to monitor the current state of the LUO > > state machine. > > Now that you have a cdev these files may be more logically placed > under the cdev's sysfs and not under kernel? This can be done easially > using the attribute mechanisms in the struct device. > > Again sort of back to my earlier point that everything should be > logically linked to the cdev as though there could be many cdevs, even > though there are not. It just keeps the code design more properly > layered and understanble rather than doing something unique.. I am going to drop this patch entirely, and only rely on "luoctl state" (see https://tinyurl.com/luoddesign) to query the state from "/dev/liveupdate" Pasha