Messages in this thread | | | From | Muchun Song <> | Date | Thu, 7 Jan 2021 10:52:21 +0800 | Subject | Re: [External] Re: [PATCH v2 1/6] mm: migrate: do not migrate HugeTLB page whose refcount is one |
| |
On Thu, Jan 7, 2021 at 12:13 AM Michal Hocko <mhocko@suse.com> 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.
> -- > Michal Hocko > SUSE Labs
| |