Re: [PATCH v7 08/14] KVM: Rename mmu_notifier_*

Sean Christopherson
2022-07-29T19:02:23Z

On Wed, Jul 06, 2022, Chao Peng wrote:
> The sync mechanism between mmu_notifier and page fault handler employs
> fields mmu_notifier_seq/count and mmu_notifier_range_start/end. For the
> to be added private memory, there is the same mechanism needed but not
> rely on mmu_notifier (It uses new introduced memfile_notifier). This
> patch renames the existing fields and related helper functions to a
> neutral name mmu_updating_* so private memory can reuse.

mmu_updating_* is too broad of a term, e.g. page faults and many other operations
also update the mmu. Although the name most definitely came from the mmu_notifier,
it's not completely inaccurate for other sources, e.g. KVM's MMU is still being
notified of something, even if the source is not the actual mmu_notifier.

If we really want a different name, I'd vote for nomenclature that captures the
invalidation aspect, which is really what the variables are all trackng, e.g.

mmu_invalidate_seq
mmu_invalidate_in_progress
mmu_invalidate_range_start
mmu_invalidate_range_end