On Mon, Jun 2, 2025 at 9:11 AM Jason Gunthorpe <j...@nvidia.com> wrote: > > On Sat, May 31, 2025 at 08:16:14PM -0700, David Rientjes wrote: > > Pratyush asked about the relationship between KHO and LUO. Pasha noted > > that KHO provides a state machine and in RFC v2 of LUO, LUO can drive KHO > > which makes the KHO debugfs interface optional. KHO activate will cause > > LUO to switch to the prepared phase, for example. /dev/liveupdate > > continues to be the preferred mechanism. Think of KHO as preserving state > > across kexec whereas LUO provides the state machine. > > IMHO LUO should superceed the statemachine in KHO and it's > debugfs. Just remove all the KHO stuff here. We don't need two things..
I agree, these two patches [1] [2] make KHO debugfs optional. I think it is reasonable to keep KHO debugfs interface optionally available for selftests, debugging, and development purposes. I do not think it will be needed in production. [1] https://lore.kernel.org/all/20250515182322.117840-2-pasha.tatas...@soleen.com/ [2] https://lore.kernel.org/all/20250515182322.117840-3-pasha.tatas...@soleen.com/ Pasha
