On Mon, Sep 11, 2023 at 03:41:44PM -0400, Johannes Weiner wrote: > When claiming a block during compaction isolation, move any remaining > free pages to the correct freelists as well, instead of stranding them > on the wrong list. Otherwise, this encourages incompatible page mixing > down the line, and thus long-term fragmentation. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Hmm, this is potentially expensive in some cases but it's also correct. Given how expensive the whole path is, I doubt it's noticable and some of this activity will be !direct_compaction anyway and relatively invisible even if I'm not a fan of hiding overhead in kthreads. Either way; Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> -- Mel Gorman SUSE Labs
