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Re: [PATCH 0.14] oom detection rework v6

From Vlastimil Babka <vbabka@suse.cz>
Newsgroups linux.kernel
Subject Re: [PATCH 0.14] oom detection rework v6
Date 2016-05-10 09:10 +0200
Message-ID <rx9XP-5Zf-5@gated-at.bofh.it> (permalink)
References (1 earlier) <ruXR7-6ki-1@gated-at.bofh.it> <rv0Fj-DB-9@gated-at.bofh.it> <rv683-5L8-49@gated-at.bofh.it> <rv9yW-DZ-7@gated-at.bofh.it> <rx9Eu-5o7-11@gated-at.bofh.it>
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On 05/10/2016 08:41 AM, Joonsoo Kim wrote:
> You applied band-aid for CONFIG_COMPACTION and fixed some reported
> problem but it is also fragile. Assume almost pageblock's skipbit are
> set. In this case, compaction easily returns COMPACT_COMPLETE and your
> logic will stop retry. Compaction isn't designed to report accurate
> fragmentation state of the system so depending on it's return value
> for OOM is fragile.

Guess I'll just post a RFC now, even though it's not much tested...

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Thread

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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