On Wed 28-05-25 23:01:04, David Hildenbrand wrote: [...] > I think we just have to be careful to document it properly -- especially the > shortcomings and that this feature might become a problem in the future. > Movable user-space page tables getting placed on CMA memory would probably > not be a problem if we don't care about ... user-space data either way.
I think makedumpfile could refuse to capture a dump if userspace memory is requested to enforce this. > The whole "Direct I/O takes max 1s" part is a bit shaky. Maybe it could be > configurable how long to wait? 10s is certainly "safer". Quite honestly we will never know and rather than making this configurable I would go with reasonably large. Couple of seconds certainly do not matter for the kdump situations but I would go as far as minutes. -- Michal Hocko SUSE Labs
