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AJvYcCVnztl6eeY9gBLePfwOUAaJZkXsHTSfU2trzFhSDc+FYlQPXTwW0eTxTlT464INP4ifCag+ATUo4JE=@vger.kernel.org X-Gm-Message-State: AOJu0YwrmIz0z0bcyjwGRI0MyL3Ybe/DmHg001yjM2PiSibfI2X9TvoE LR3BZli+VaAJkVuKElHonP+8fU34rOeXofaVXluVDSLKvHsxzv47LZrqY7yeuk2gQg9+xrnIitk J4d4INHvmI/AHycJQSCr6LGQdcHGPr3zzC8Cbx4bgYg== X-Gm-Gg: ASbGncsx3L/3TqjbvQpxvT6zErrs6XWRz056BW9kEXFPYN++tpUi+M7AryqFdqVVqBJ dpTQ9W47oufWaqRjb9mZoNuobN2ovnyOXNE1PO8FeXCvrdB0/vnBt7pD9H4QF2tff8k1/oAgR9C OgLPe3vSP0dmSo8AdlDpJEVTqAslIworHapV/c07cxvExaAl3BsRLShgCU2zqFuqJ1OaZOD8NI7 vrlalSUWlAbS46CoU+jq3tnGGyVvhu/yS5GCVPpnSyneVg/te8YimFIP7TM0HnPk2n1 X-Google-Smtp-Source: AGHT+IEAy8cPLsziX/RCDUv2Dd6Ywa5OE8z1bKSydNZGkCZ2bkHrdBqmgyzeg7NbMT02IJqrhiQfoZnn25FUb9ZItfc= X-Received: by 2002:a05:6402:3046:10b0:63b:feb1:3288 with SMTP id 4fb4d7f45d1cf-6431a55ddb0mr392712a12.25.1762893781751; Tue, 11 Nov 2025 12:43:01 -0800 (PST) Precedence: bulk X-Mailing-List: linux-api@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20251107210526.257742-1-pasha.tatashin@soleen.com> <20251107210526.257742-3-pasha.tatashin@soleen.com> In-Reply-To: From: Pasha Tatashin Date: Tue, 11 Nov 2025 15:42:24 -0500 X-Gm-Features: AWmQ_bnMmE_G9j7GUZRZnZwadwZMShQe0h1eQQimW1N6CMMoPEVysMT2zmRBrNU Message-ID: Subject: Re: [PATCH v5 02/22] liveupdate: luo_core: integrate with KHO To: Mike Rapoport 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, 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, jgg@nvidia.com, parav@nvidia.com, leonro@nvidia.com, witu@nvidia.com, hughd@google.com, skhawaja@google.com, chrisl@kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Nov 11, 2025 at 3:39=E2=80=AFPM Pasha Tatashin wrote: > > > > kho_memory_init(); > > > > > > + /* Live Update should follow right after KHO is initialized */ > > > + liveupdate_init(); > > > + > > > > Why do you think it should be immediately after kho_memory_init()? > > Any reason this can't be called from start_kernel() or even later as an > > early_initcall() or core_initall()? > > Unfortunately, no, even here it is too late, and we might need to find > a way to move the kho_init/liveupdate_init earlier. We must be able to > preserve HugeTLB pages, and those are reserved earlier in boot. Just to clarify: liveupdate_init() is needed to start using: liveupdate_flb_incoming_* API, and FLB data is needed during HugeTLB reservation. Pasha