On Wed, Jan 11, 2023 at 04:36:01PM +0100, Michal Hocko wrote: > On Mon 09-01-23 15:16:27, Mel Gorman wrote: > > A high-order ALLOC_HARDER allocation is assumed to be atomic. While that > > is accurate, it changes later in the series. In preparation, explicitly > > record high-order atomic allocations in gfp_to_alloc_flags(). There is > > a slight functional change in that OOM handling avoids using high-order > > reserve until it has to. > > I do not follow the oom handling part. IIRC we are dropping highatomic > reserves before triggering oom. Something might have changed down the > path but I can still see unreserve_highatomic_pageblock in > should_reclaim_retry. > That comment is now stale and should be removed because I fixed up the OOM oddities. At this point, a series resubmission is needed because a few changelogs have to be updated. -- Mel Gorman SUSE Labs
