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* [RFC PATCH 0/2] fix unbounded too_many_isolated
@ 2017-01-18 13:44 ` Michal Hocko
  0 siblings, 0 replies; 110+ messages in thread
From: Michal Hocko @ 2017-01-18 13:44 UTC (permalink / raw)
  To: linux-mm; +Cc: Mel Gorman, Johannes Weiner, Tetsuo Handa, LKML

Hi,
this is based on top of [1]. The first patch continues in the direction
of moving some decisions to zones rather than nodes. In this case it is
the NR_ISOLATED* counters which I believe need to be zone aware as well.
See patch 1 for more information why.

The second path builds on top of that and tries to address the problem
which has been reported by Tetsuo several times already. In the
current implementation we can loop deep in the reclaim path without
any effective way out to re-evaluate our decisions about the reclaim
retries. Patch 2 says more about that but in principle we should locate
retry logic as high in the allocator chain as possible and so we should
get rid of any unbound retry loops inside the reclaim. This is what the
patch does.

I am sending this as an RFC because I am not yet sure this is the best
forward. My testing shows that the system behaves sanely.

Thoughts, comments?

[1] http://lkml.kernel.org/r/20170117103702.28542-1-mhocko@kernel.org

Michal Hocko (2):
      mm, vmscan: account the number of isolated pages per zone
      mm, vmscan: do not loop on too_many_isolated for ever

 include/linux/mmzone.h |  4 +--
 mm/compaction.c        | 16 ++++-----
 mm/khugepaged.c        |  4 +--
 mm/memory_hotplug.c    |  2 +-
 mm/migrate.c           |  4 +--
 mm/page_alloc.c        | 14 ++++----
 mm/vmscan.c            | 93 ++++++++++++++++++++++++++++++++------------------
 mm/vmstat.c            |  4 +--
 8 files changed, 82 insertions(+), 59 deletions(-)

^ permalink raw reply	[flat|nested] 110+ messages in thread

end of thread, other threads:[~2017-02-26  6:36 UTC | newest]

Thread overview: 110+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-01-18 13:44 [RFC PATCH 0/2] fix unbounded too_many_isolated Michal Hocko
2017-01-18 13:44 ` Michal Hocko
2017-01-18 13:44 ` [RFC PATCH 1/2] mm, vmscan: account the number of isolated pages per zone Michal Hocko
2017-01-18 13:44   ` Michal Hocko
2017-01-18 14:46   ` Mel Gorman
2017-01-18 14:46     ` Mel Gorman
2017-01-18 15:15     ` Michal Hocko
2017-01-18 15:15       ` Michal Hocko
2017-01-18 15:54       ` Mel Gorman
2017-01-18 15:54         ` Mel Gorman
2017-01-18 16:17         ` Michal Hocko
2017-01-18 16:17           ` Michal Hocko
2017-01-18 17:00           ` Mel Gorman
2017-01-18 17:00             ` Mel Gorman
2017-01-18 17:29             ` Michal Hocko
2017-01-18 17:29               ` Michal Hocko
2017-01-19 10:07               ` Mel Gorman
2017-01-19 10:07                 ` Mel Gorman
2017-01-19 11:23                 ` Michal Hocko
2017-01-19 11:23                   ` Michal Hocko
2017-01-19 13:11                   ` Mel Gorman
2017-01-19 13:11                     ` Mel Gorman
2017-01-20 13:27                     ` Tetsuo Handa
2017-01-20 13:27                       ` Tetsuo Handa
2017-01-21  7:42                       ` Tetsuo Handa
2017-01-21  7:42                         ` Tetsuo Handa
2017-01-25 10:15                         ` Michal Hocko
2017-01-25 10:15                           ` Michal Hocko
2017-01-25 10:19                           ` Christoph Hellwig
2017-01-25 10:19                             ` Christoph Hellwig
2017-01-25 10:46                             ` Michal Hocko
2017-01-25 10:46                               ` Michal Hocko
2017-01-25 11:09                               ` Tetsuo Handa
2017-01-25 11:09                                 ` Tetsuo Handa
2017-01-25 13:00                                 ` Michal Hocko
2017-01-25 13:00                                   ` Michal Hocko
2017-01-27 14:49                                   ` Michal Hocko
2017-01-27 14:49                                     ` Michal Hocko
2017-01-28 15:27                                     ` Tetsuo Handa
2017-01-28 15:27                                       ` Tetsuo Handa
2017-01-30  8:55                                       ` Michal Hocko
2017-01-30  8:55                                         ` Michal Hocko
2017-02-02 10:14                                         ` Michal Hocko
2017-02-02 10:14                                           ` Michal Hocko
2017-02-03 10:57                                           ` Tetsuo Handa
2017-02-03 10:57                                             ` Tetsuo Handa
2017-02-03 14:41                                             ` Michal Hocko
2017-02-03 14:41                                               ` Michal Hocko
2017-02-03 14:50                                             ` Michal Hocko
2017-02-03 14:50                                               ` Michal Hocko
2017-02-03 17:24                                               ` Brian Foster
2017-02-03 17:24                                                 ` Brian Foster
2017-02-06  6:29                                                 ` Tetsuo Handa
2017-02-06  6:29                                                   ` Tetsuo Handa
2017-02-06 14:35                                                   ` Brian Foster
2017-02-06 14:35                                                     ` Brian Foster
2017-02-06 14:42                                                     ` Michal Hocko
2017-02-06 14:42                                                       ` Michal Hocko
2017-02-06 15:47                                                       ` Brian Foster
2017-02-06 15:47                                                         ` Brian Foster
2017-02-07 10:30                                                     ` Tetsuo Handa
2017-02-07 10:30                                                       ` Tetsuo Handa
2017-02-07 16:54                                                       ` Brian Foster
2017-02-07 16:54                                                         ` Brian Foster
2017-02-03 14:55                                             ` Michal Hocko
2017-02-03 14:55                                               ` Michal Hocko
2017-02-05 10:43                                               ` Tetsuo Handa
2017-02-05 10:43                                                 ` Tetsuo Handa
2017-02-06 10:34                                                 ` Michal Hocko
2017-02-06 10:34                                                   ` Michal Hocko
2017-02-06 10:39                                                 ` Michal Hocko
2017-02-06 10:39                                                   ` Michal Hocko
2017-02-07 21:12                                                   ` Michal Hocko
2017-02-07 21:12                                                     ` Michal Hocko
2017-02-08  9:24                                                     ` Peter Zijlstra
2017-02-08  9:24                                                       ` Peter Zijlstra
2017-02-21  9:40                                             ` Michal Hocko
2017-02-21  9:40                                               ` Michal Hocko
2017-02-21 14:35                                               ` Tetsuo Handa
2017-02-21 14:35                                                 ` Tetsuo Handa
2017-02-21 15:53                                                 ` Michal Hocko
2017-02-21 15:53                                                   ` Michal Hocko
2017-02-22  2:02                                                   ` Tetsuo Handa
2017-02-22  2:02                                                     ` Tetsuo Handa
2017-02-22  7:54                                                     ` Michal Hocko
2017-02-22  7:54                                                       ` Michal Hocko
2017-02-26  6:30                                                       ` Tetsuo Handa
2017-02-26  6:30                                                         ` Tetsuo Handa
2017-01-31 11:58                                   ` Michal Hocko
2017-01-31 11:58                                     ` Michal Hocko
2017-01-31 12:51                                     ` Christoph Hellwig
2017-01-31 12:51                                       ` Christoph Hellwig
2017-01-31 13:21                                       ` Michal Hocko
2017-01-31 13:21                                         ` Michal Hocko
2017-01-25 10:33                           ` [RFC PATCH 1/2] mm, vmscan: account the number of isolated pagesper zone Tetsuo Handa
2017-01-25 10:33                             ` Tetsuo Handa
2017-01-25 12:34                             ` Michal Hocko
2017-01-25 12:34                               ` Michal Hocko
2017-01-25 13:13                               ` [RFC PATCH 1/2] mm, vmscan: account the number of isolated pages per zone Tetsuo Handa
2017-01-25 13:13                                 ` Tetsuo Handa
2017-01-25  9:53                       ` Michal Hocko
2017-01-25  9:53                         ` Michal Hocko
2017-01-20  6:42                 ` Hillf Danton
2017-01-20  6:42                   ` Hillf Danton
2017-01-20  9:25                   ` Mel Gorman
2017-01-20  9:25                     ` Mel Gorman
2017-01-18 13:44 ` [RFC PATCH 2/2] mm, vmscan: do not loop on too_many_isolated for ever Michal Hocko
2017-01-18 13:44   ` Michal Hocko
2017-01-18 14:50   ` Mel Gorman
2017-01-18 14:50     ` Mel Gorman

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