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Re: [PATCH 2/5] oom reaper: handle mlocked pages

From David Rientjes <rientjes@google.com>
Newsgroups linux.kernel
Subject Re: [PATCH 2/5] oom reaper: handle mlocked pages
Date 2016-02-04 01:00 +0100
Message-ID <qYfv7-Cf-71@gated-at.bofh.it> (permalink)
References <qY5vH-2qT-5@gated-at.bofh.it> <qY5vI-2qT-25@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, 3 Feb 2016, Michal Hocko wrote:

> From: Michal Hocko <mhocko@suse.com>
> 
> __oom_reap_vmas current skips over all mlocked vmas because they need a
> special treatment before they are unmapped. This is primarily done for
> simplicity. There is no reason to skip over them and reduce the amount
> of reclaimed memory. This is safe from the semantic point of view
> because try_to_unmap_one during rmap walk would keep tell the reclaim
> to cull the page back and mlock it again.
> 
> munlock_vma_pages_all is also safe to be called from the oom reaper
> context because it doesn't sit on any locks but mmap_sem (for read).
> 
> Signed-off-by: Michal Hocko <mhocko@suse.com>

Acked-by: David Rientjes <rientjes@google.com>

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Thread

[PATCH 0/5] oom reaper v5 Michal Hocko <mhocko@kernel.org> - 2016-02-03 14:20 +0100
  [PATCH 2/5] oom reaper: handle mlocked pages Michal Hocko <mhocko@kernel.org> - 2016-02-03 14:20 +0100
    Re: [PATCH 2/5] oom reaper: handle mlocked pages David Rientjes <rientjes@google.com> - 2016-02-04 01:00 +0100
  [PATCH 4/5] mm, oom_reaper: report success/failure Michal Hocko <mhocko@kernel.org> - 2016-02-03 14:20 +0100
    Re: [PATCH 4/5] mm, oom_reaper: report success/failure David Rientjes <rientjes@google.com> - 2016-02-04 00:20 +0100
      Re: [PATCH 4/5] mm, oom_reaper: report success/failure Michal Hocko <mhocko@kernel.org> - 2016-02-04 07:50 +0100
        Re: [PATCH 4/5] mm, oom_reaper: report success/failure David Rientjes <rientjes@google.com> - 2016-02-04 23:40 +0100
          Re: [PATCH 4/5] mm, oom_reaper: report success/failure Michal Hocko <mhocko@kernel.org> - 2016-02-05 10:30 +0100
            Re: [PATCH 4/5] mm, oom_reaper: report success/failure Michal Hocko <mhocko@kernel.org> - 2016-02-06 07:40 +0100
  [PATCH 1/5] mm, oom: introduce oom reaper Michal Hocko <mhocko@kernel.org> - 2016-02-03 14:20 +0100
    Re: [PATCH 1/5] mm, oom: introduce oom reaper David Rientjes <rientjes@google.com> - 2016-02-04 00:50 +0100
      Re: [PATCH 1/5] mm, oom: introduce oom reaper Michal Hocko <mhocko@kernel.org> - 2016-02-04 07:50 +0100
    Re: [PATCH 1/5] mm, oom: introduce oom reaper Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-06 14:30 +0100
  [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Michal Hocko <mhocko@kernel.org> - 2016-02-03 14:20 +0100
    Re: [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-04 11:50 +0100
      Re: [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Michal Hocko <mhocko@kernel.org> - 2016-02-04 16:00 +0100
        Re: [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-06 07:00 +0100
          Re: [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Michal Hocko <mhocko@kernel.org> - 2016-02-06 09:40 +0100
            Re: [PATCH 5/5] mm, oom_reaper: implement OOM victims queuing Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-06 16:40 +0100
  [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Michal Hocko <mhocko@kernel.org> - 2016-02-03 14:20 +0100
    Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-04 15:40 +0100
      Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to  unmap the address space Michal Hocko <mhocko@kernel.org> - 2016-02-04 15:50 +0100
        Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-04 16:10 +0100
          Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to  unmap the address space Michal Hocko <mhocko@kernel.org> - 2016-02-04 17:40 +0100
            Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-05 12:20 +0100
              Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to  unmap the address space Michal Hocko <mhocko@kernel.org> - 2016-02-06 09:40 +0100
                Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-06 12:30 +0100
        Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to  unmap the address space Michal Hocko <mhocko@kernel.org> - 2016-02-06 07:50 +0100
          Re: [PATCH 3/5] oom: clear TIF_MEMDIE after oom_reaper managed to unmap the address space Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-02-06 15:40 +0100

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