On Thu 07-01-21 10:52:21, Muchun Song wrote: > On Thu, Jan 7, 2021 at 12:13 AM Michal Hocko <mhocko@xxxxxxxx> wrote: > > > > On Wed 06-01-21 16:47:34, Muchun Song wrote: > > > If the refcount is one when it is migrated, it means that the page > > > was freed from under us. So we are done and do not need to migrate. > > > > Is this common enough that it would warrant the explicit check for each > > migration? > > Are you worried about the overhead caused by the check? Thanks. I am not as worried as I would like to see some actual justification for this optimization. -- Michal Hocko SUSE Labs
