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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-Rspam-User: X-Rspamd-Queue-Id: 4C03C40007 X-Rspamd-Server: rspam06 X-Stat-Signature: dhwnjxocohkuc6z4dch6rsxgq4scpqtf X-HE-Tag: 1779043254-686192 X-HE-Meta: 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 WWtks1CA 88Q1O9pchg0z41uT9DcTz8X67KWzqhmj/RQzkvYVa3uc4uB8ZnGaHTeU7IS0PLOCqKaO/VAcJWMJapNkI8l3ug9arXUgEzaYxFdxKc5g+4Ox1n4rFiHJWsmEZWbhbLxoXX6KHg/QiM6Qqzr4XIQqcM4F3dCc4OskpHUFnThk5SloApHtPtCoXHEJOVRp5aBpySweH0WlMn63DBy6+kpsJkUWQzxTrhS2nBTy5q0szM0nXRcXDFCLEjOOx273o6qNNm5Z0dBcHCHwh3V6jCkgaxhwJ556sH5okpPSOtcjUSnNWprnn8MpY4roGEq/JpBz76QpWVNLiaepHHVbhhs6GxmYxlnxDvJXj6EaUqr9ZVq0HHpMT9Lg+qbhwP7xJCaLSRa0JeoU5ef/NzjFEC8Q9hiZcF1yRh+A44SNj4FLUIQ+GuzBBqWPZWiIlto3c7a/uB76admdR7Htnk+U= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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.