Re: [PATCH 00/25] Increase success rates and reduce latency of compaction v2

[Andrew Morton]

On Fri,  4 Jan 2019 12:49:46 +0000 Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> wrote:

> This series reduces scan rates and success rates of compaction, primarily
> by using the free lists to shorten scans, better controlling of skip
> information and whether multiple scanners can target the same block and
> capturing pageblocks before being stolen by parallel requests. The series
> is based on the 4.21/5.0 merge window after Andrew's tree had been merged.
> It's known to rebase cleanly.
> 
> ...
>
>  include/linux/compaction.h |    3 +-
>  include/linux/gfp.h        |    7 +-
>  include/linux/mmzone.h     |    2 +
>  include/linux/sched.h      |    4 +
>  kernel/sched/core.c        |    3 +
>  mm/compaction.c            | 1031 ++++++++++++++++++++++++++++++++++----------
>  mm/internal.h              |   23 +-
>  mm/migrate.c               |    2 +-
>  mm/page_alloc.c            |   70 ++-
>  9 files changed, 908 insertions(+), 237 deletions(-)

Boy that's a lot of material.  I just tossed it in there unread for
now.  Do you have any suggestions as to how we can move ahead with
getting this appropriately reviewed and tested?