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[PATCH 0/3] mm, oom: add oom detection tracepoints

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From	Michal Hocko <mhocko@kernel.org>
Newsgroups	linux.kernel
Subject	[PATCH 0/3] mm, oom: add oom detection tracepoints
Date	Wed, 14 Dec 2016 16:00:01 +0100
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Hi,
this is a long overdue and I am really sorry about that. I just didn't
get to sit and come up with this earlier as there was always some
going on which preempted it. This patchset adds two tracepoints which
should help us to debug oom decision making. The first one is placed
in should_reclaim_retry and it tells us why do we keep retrying the
allocation and reclaim while the second is in should_compact_retry which
tells us the similar for the high order requests.

In combination with the existing compaction and reclaim tracepoints we
can draw a much better picture about what is going on and why we go
and declare the oom.

I am not really a tracepoint guy so I hope I didn't do anything
obviously stupid there. Thanks to Vlastimil for his help before I've
posted this.

Anywa feedback is of course welcome!
Michal Hocko (3):
      mm, trace: extract COMPACTION_STATUS and ZONE_TYPE to a common header
      oom, trace: Add oom detection tracepoints
      oom, trace: add compaction retry tracepoint

 include/trace/events/compaction.h | 56 ------------------------
 include/trace/events/mmflags.h    | 90 +++++++++++++++++++++++++++++++++++++++
 include/trace/events/oom.h        | 81 +++++++++++++++++++++++++++++++++++
 mm/page_alloc.c                   | 32 ++++++++++----
 4 files changed, 195 insertions(+), 64 deletions(-)

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[PATCH 0/3] mm, oom: add oom detection tracepoints Michal Hocko <mhocko@kernel.org> - 2016-12-14 16:00 +0100
  [PATCH 1/3] mm, trace: extract COMPACTION_STATUS and ZONE_TYPE to a common header Michal Hocko <mhocko@kernel.org> - 2016-12-14 16:00 +0100
    Re: [PATCH 1/3] mm, trace: extract COMPACTION_STATUS and ZONE_TYPE to  a common header Vlastimil Babka <vbabka@suse.cz> - 2016-12-14 18:20 +0100
    Re: [PATCH 1/3] mm, trace: extract COMPACTION_STATUS and ZONE_TYPE  to a common header Michal Hocko <mhocko@kernel.org> - 2016-12-14 20:10 +0100
  [PATCH 3/3] oom, trace: add compaction retry tracepoint Michal Hocko <mhocko@kernel.org> - 2016-12-14 16:00 +0100
    Re: [PATCH 3/3] oom, trace: add compaction retry tracepoint Vlastimil Babka <vbabka@suse.cz> - 2016-12-14 18:30 +0100
      Re: [PATCH 3/3] oom, trace: add compaction retry tracepoint Michal Hocko <mhocko@kernel.org> - 2016-12-14 19:20 +0100
        Re: [PATCH 3/3] oom, trace: add compaction retry tracepoint Vlastimil Babka <vbabka@suse.cz> - 2016-12-15 09:20 +0100

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