Re: [PATCH v7 9/9] mm: always use the zone-device template init path

> The template path still has a local opt-out predicate for the
> page_ref_set tracepoint and keeps a non-template fallback path. This
> makes the code more complex without a strong reason to keep the
> separate path.
> 
> Use the template path unconditionally after the corresponding seed page
> has been initialized: the first head page seeds the head template, and
> the first tail page in each compound range seeds the tail template.
> 
> This keeps the first-page seeding logic unchanged, but removes the extra
> non-template fallback from the main loops.
> 
> This also means sanitized builds no longer force this path back to the
> per-page initialization stores, and an enabled page_ref_set tracepoint
> will no longer observe every ZONE_DEVICE initialization-time refcount
> assignment. That tradeoff is intentional: this code is still initializing
> struct pages before they are handed out, and keeping those local debug
> special cases would preserve a separate initialization-only path while
> making the common code more complex.

Just fold this change into the relevant patches and don't introduce the
opt-out at the first place.

-- 
Sincerely yours,
Mike.