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Re: [PATCH 0/9] oom reaper v6

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On Tue, 22 Mar 2016, Michal Hocko wrote:

> Hi,
> I am reposting the whole patchset on top of the current Linus tree which should
> already contain big pile of Andrew's mm patches. This should serve an easier
> reviewability and I also hope that this core part of the work can go to 4.6.
> 
> The previous version was posted here [1] Hugh and David have suggested to
> drop [2] because the munlock path currently depends on the page lock and
> it is better if the initial version was conservative and prevent from
> any potential lockups even though it is not clear whether they are real
> - nobody has seen oom_reaper stuck on the page lock AFAICK. Me or Hugh
> will have a look and try to make the munlock path not depend on the page
> lock as a follow up work.
> 
> Apart from that the feedback revealed one bug for a very unusual
> configuration (sysctl_oom_kill_allocating_task) and that has been fixed
> by patch 8 and one potential mis interaction with the pm freezer fixed by
> patch 7.
> 
> I think the current code base is already very useful for many situations.
> The rest of the feedback was mostly about potential enhancements of the
> current code which I would really prefer to build on top of the current
> series. I plan to finish my mmap_sem killable for write in the upcoming
> release cycle and hopefully have it merged in the next merge window.
> I believe more extensions will follow.
> 
> This code has been sitting in the mmotm (thus linux-next) for a while.
> Are there any fundamental objections to have this part merged in this
> merge window?
> 

Tetsuo, have you been able to run your previous test cases on top of this 
version and do you have any concerns about it or possible extensions that 
could be made?

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[PATCH 0/9] oom reaper v6 Michal Hocko <mhocko@kernel.org> - 2016-03-22 12:10 +0100
  [PATCH 3/9] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Michal Hocko <mhocko@kernel.org> - 2016-03-22 12:10 +0100
  [PATCH 7/9] oom: make oom_reaper_list single linked Michal Hocko <mhocko@kernel.org> - 2016-03-22 12:10 +0100
  [PATCH 6/9] oom, oom_reaper: disable oom_reaper for oom_kill_allocating_task Michal Hocko <mhocko@kernel.org> - 2016-03-22 12:10 +0100
  [PATCH 4/9] mm, oom_reaper: report success/failure Michal Hocko <mhocko@kernel.org> - 2016-03-22 12:10 +0100
  Re: [PATCH 0/9] oom reaper v6 David Rientjes <rientjes@google.com> - 2016-03-22 23:10 +0100
    Re: [PATCH 0/9] oom reaper v6 Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-03-23 12:30 +0100
      Re: [PATCH 0/9] oom reaper v6 Michal Hocko <mhocko@kernel.org> - 2016-03-23 13:10 +0100

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