[PATCH v2 04/10] liveupdate: add support for linked-block serialization

[Pasha Tatashin]

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 <pasha.tatashin at soleen.com>
> > ---
> >  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.