On 23/10/2025 22:10, David Hildenbrand wrote: > On 15.10.25 10:27, Kevin Brodsky wrote: >> powerpc decides at runtime whether the lazy MMU mode should be used. >> >> To avoid the overhead associated with managing >> task_struct::lazy_mmu_state if the mode isn't used, introduce >> arch_wants_lazy_mmu_mode() and bail out of lazy_mmu_mode_* if it >> returns false. Add a default definition returning true, and an >> appropriate implementation for powerpc. >> >> Signed-off-by: Kevin Brodsky <[email protected]> >> --- >> This patch seemed like a good idea to start with, but now I'm not so >> sure that the churn added to the generic layer is worth it. > > Exactly my thoughts :) > > I think we need evidence that this is really worth it for optimizing > out basically a counter update on powerpc.
Ack, I'll drop that patch in v4 unless someone sees a better justification for it. - Kevin
