On Sat, Jul 01, 2023 at 09:32:38PM -0700, Hugh Dickins wrote: > On Thu, 29 Jun 2023, Hugh Dickins wrote: Hi Hugh, ... > No, not quite the same rules as before: I came to realize that using > list_add_tail() for the HH pages would be liable to put a page on the > list which forever blocked reuse of PP list_add_tail() pages after it > (could be solved by a list_move() somewhere, but we have agreed to > prefer simplicity). Just to make things more clear for me: do I understand correctly that this was an attempt to add HH fragments to pgtable_list from pte_free_defer()? Thanks!