On Mon, Feb 02, 2026 at 09:23:07PM +0800, Lance Yang wrote: > Hmm... we need MB rather than RMB on the sync side. Is that correct? > > Walker: > [W]active_lockless_pt_walk_mm = mm -> MB -> [L]page-tables > > Sync: > [W]page-tables -> MB -> [L]active_lockless_pt_walk_mm >
This can work -- but only if the walker and sync touch the same page-table address. Now, typically I would imagine they both share the p4d/pud address at the very least, right?
