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Sun, 17 May 2026 11:40:53 -0700 (PDT) Received: from plex ([71.181.43.54]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ca3619c7d9sm29192256d6.36.2026.05.17.11.40.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 May 2026 11:40:52 -0700 (PDT) Date: Sun, 17 May 2026 18:40:50 +0000 From: Pasha Tatashin To: Mike Rapoport Cc: Pasha Tatashin , linux-kselftest@vger.kernel.org, shuah@kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, skhan@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, corbet@lwn.net, dmatlack@google.com, kexec@lists.infradead.org, pratyush@kernel.org, skhawaja@google.com, graf@amazon.com Subject: Re: [PATCH v2 04/10] liveupdate: add support for linked-block serialization Message-ID: References: <20260514222628.931312-1-pasha.tatashin@soleen.com> <20260514222628.931312-5-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260517_114054_552018_E5B6B1F8 X-CRM114-Status: GOOD ( 17.78 ) X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On 05-17 20:26, Mike Rapoport wrote: > On Thu, May 14, 2026 at 10:26:22PM +0000, Pasha Tatashin wrote: > > Introduce a linked-block serialization mechanism for LUO state. > > > > Previously, LUO used contiguous memory blocks for serializing sessions > > and files, which imposed limits on the total number of items that could > > be preserved across a live update. > > > > This commit adds the infrastructure for a more flexible, block-based > > approach where serialized data is stored in a chain of linked blocks. > > This is a preparatory step to allow an unlimited number of > > luo_sessions and luo_files to be preserved. > > Shouldn't it be a part of KHO? It can be. However, at the moment, it is only used by LUO, so I kept it there. Sami is also planning to use it for IOMMU; if so, he will adopt the interface for his usage as well, and move it to a separate KHO library. > > > Signed-off-by: Pasha Tatashin > > --- > > Documentation/core-api/liveupdate.rst | 8 + > > include/linux/kho/abi/luo.h | 22 ++ > > kernel/liveupdate/Makefile | 1 + > > kernel/liveupdate/luo_block.c | 388 ++++++++++++++++++++++++++ > > kernel/liveupdate/luo_internal.h | 57 ++++ > > 5 files changed, 476 insertions(+) > > create mode 100644 kernel/liveupdate/luo_block.c > > -- > Sincerely yours, > Mike.