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Re: [PATCH 08/14] mm, compaction: Abstract compaction feedback to helpers

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From Vlastimil Babka <vbabka@suse.cz>
Newsgroups linux.kernel
Subject Re: [PATCH 08/14] mm, compaction: Abstract compaction feedback to helpers
Date Thu, 28 Apr 2016 10:50:02 +0200
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On 04/20/2016 09:47 PM, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
>
> Compaction can provide a wild variation of feedback to the caller. Many
> of them are implementation specific and the caller of the compaction
> (especially the page allocator) shouldn't be bound to specifics of the
> current implementation.
>
> This patch abstracts the feedback into three basic types:
> 	- compaction_made_progress - compaction was active and made some
> 	  progress.
> 	- compaction_failed - compaction failed and further attempts to
> 	  invoke it would most probably fail and therefore it is not
> 	  worth retrying
> 	- compaction_withdrawn - compaction wasn't invoked for an
>            implementation specific reasons. In the current implementation
>            it means that the compaction was deferred, contended or the
>            page scanners met too early without any progress. Retrying is
>            still worthwhile.
>
> [vbabka@suse.cz: do not change thp back off behavior]
> Signed-off-by: Michal Hocko <mhocko@suse.com>

Acked-by: Vlastimil Babka <vbabka@suse.cz>

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[PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
  [PATCH 07/14] mm, compaction: Simplify __alloc_pages_direct_compact feedback interface Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
  [PATCH 03/14] mm, compaction: cover all compaction mode in compact_zone Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
  [PATCH 10/14] mm, oom: rework oom detection Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
  [PATCH 14/14] mm, oom, compaction: prevent from should_compact_retry looping for ever for costly orders Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
    Re: [PATCH 14/14] mm, oom, compaction: prevent from  should_compact_retry looping for ever for costly orders Vlastimil Babka <vbabka@suse.cz> - 2016-04-28 11:00 +0200
      Re: [PATCH 14/14] mm, oom, compaction: prevent from  should_compact_retry looping for ever for costly orders Michal Hocko <mhocko@kernel.org> - 2016-04-28 14:40 +0200
    Re: [PATCH 14/14] mm, oom, compaction: prevent from  should_compact_retry looping for ever for costly orders Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-04 08:30 +0200
      Re: [PATCH 14/14] mm, oom, compaction: prevent from  should_compact_retry looping for ever for costly orders Michal Hocko <mhocko@kernel.org> - 2016-05-04 11:10 +0200
        Re: [PATCH 14/14] mm, oom, compaction: prevent from  should_compact_retry looping for ever for costly orders Joonsoo Kim <js1304@gmail.com> - 2016-05-04 17:20 +0200
          Re: [PATCH 14/14] mm, oom, compaction: prevent from  should_compact_retry looping for ever for costly orders Michal Hocko <mhocko@kernel.org> - 2016-05-04 21:30 +0200
  [PATCH 11/14] mm: throttle on IO only when there are too many dirty and writeback pages Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
  [PATCH 12/14] mm, oom: protect !costly allocations some more Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
    Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-04 08:10 +0200
      Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-04 08:40 +0200
        Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Michal Hocko <mhocko@kernel.org> - 2016-05-04 11:00 +0200
          Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Joonsoo Kim <js1304@gmail.com> - 2016-05-04 17:00 +0200
            Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Michal Hocko <mhocko@kernel.org> - 2016-05-04 20:20 +0200
      Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Michal Hocko <mhocko@kernel.org> - 2016-05-04 11:00 +0200
        Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Joonsoo Kim <js1304@gmail.com> - 2016-05-04 16:40 +0200
          Re: [PATCH 12/14] mm, oom: protect !costly allocations some more Michal Hocko <mhocko@kernel.org> - 2016-05-04 20:30 +0200
  [PATCH 01/14] vmscan: consider classzone_idx in compaction_ready Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
    Re: [PATCH 01/14] vmscan: consider classzone_idx in compaction_ready "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2016-04-21 06:40 +0200
    Re: [PATCH 01/14] vmscan: consider classzone_idx in compaction_ready Michal Hocko <mhocko@kernel.org> - 2016-05-04 16:00 +0200
  [PATCH 05/14] mm, compaction: distinguish between full and partial COMPACT_COMPLETE Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
    Re: [PATCH 05/14] mm, compaction: distinguish between full and partial COMPACT_COMPLETE "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2016-04-21 08:40 +0200
  [PATCH 08/14] mm, compaction: Abstract compaction feedback to helpers Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
    Re: [PATCH 08/14] mm, compaction: Abstract compaction feedback to  helpers Vlastimil Babka <vbabka@suse.cz> - 2016-04-28 10:50 +0200
  [PATCH 09/14] mm: use compaction feedback for thp backoff conditions Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
    Re: [PATCH 09/14] mm: use compaction feedback for thp backoff conditions "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2016-04-21 09:10 +0200
    Re: [PATCH 09/14] mm: use compaction feedback for thp backoff  conditions Vlastimil Babka <vbabka@suse.cz> - 2016-04-28 11:00 +0200
      Re: [PATCH 09/14] mm: use compaction feedback for thp backoff  conditions Michal Hocko <mhocko@kernel.org> - 2016-04-28 14:40 +0200
        Re: [PATCH 09/14] mm: use compaction feedback for thp backoff  conditions Vlastimil Babka <vbabka@suse.cz> - 2016-04-29 11:20 +0200
          Re: [PATCH 09/14] mm: use compaction feedback for thp backoff  conditions Michal Hocko <mhocko@kernel.org> - 2016-04-29 11:30 +0200
  [PATCH 13/14] mm: consider compaction feedback also for costly allocation Michal Hocko <mhocko@kernel.org> - 2016-04-20 21:50 +0200
  [PATCH 04/14] mm, compaction: distinguish COMPACT_DEFERRED from COMPACT_SKIPPED Michal Hocko <mhocko@kernel.org> - 2016-04-20 22:00 +0200
  [PATCH 02/14] mm, compaction: change COMPACT_ constants into enum Michal Hocko <mhocko@kernel.org> - 2016-04-20 22:00 +0200
  Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-04 07:50 +0200
    Re: [PATCH 0.14] oom detection rework v6 Vlastimil Babka <vbabka@suse.cz> - 2016-05-04 10:20 +0200
      Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-04 10:40 +0200
      Re: [PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-05-04 11:00 +0200
    Re: [PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-05-04 10:50 +0200
      Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <js1304@gmail.com> - 2016-05-04 16:40 +0200
        Re: [PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-05-04 20:20 +0200
          Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <js1304@gmail.com> - 2016-05-10 08:50 +0200
            Re: [PATCH 0.14] oom detection rework v6 Vlastimil Babka <vbabka@suse.cz> - 2016-05-10 09:10 +0200
              Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <js1304@gmail.com> - 2016-05-10 10:10 +0200
                Re: [PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-05-10 11:50 +0200
            Re: [PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-05-10 11:50 +0200
              Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-12 04:30 +0200
                Re: [PATCH 0.14] oom detection rework v6 Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2016-05-12 07:20 +0200
                Re: [PATCH 0.14] oom detection rework v6 Michal Hocko <mhocko@kernel.org> - 2016-05-12 13:10 +0200

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