Re: [v3 2/3] mm: Defer TLB flush by keeping both src and dst folios at migration

[Byungchul Park]

On Mon, Oct 30, 2023 at 09:51:30PM +0900, Byungchul Park wrote:
> On Mon, Oct 30, 2023 at 08:50:20AM +0000, Nadav Amit wrote:
> > I do not follow the ordering that ensures a migrated page would not
> > become writable before the migration is over. Perhaps a comment on what
> > guarantees the order would help.

IIUC, it'd be safe because unmap is performed first at the beginning of
each migration so as to be safe with page fault handlers. So I don't
think it should be a concern. Or am I missing something?

	Byungchul