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[PATCH -mm 0/3] mm/oom_kill: ensure we actually kill all tasks sharing the same mm

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Michal, Tetsuo, David, sorry for delay. I'll try to read and answer
your emails in "can't oom-kill zap the victim's memory" thread later.

Let me send some initial changes which imo makes sense regardless,
but if we want to zap the victim's memory we need to ensure that all
tasks which share this ->mm were actually killed (see 3/3).

Please review, this series is simple but only compile tested.

Andrew, this is on top of linux-mmotm.git + the recent mm-oom-remove-
task_lock-protecting-comm-printing.patch from David.

Oleg.

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[PATCH -mm 0/3] mm/oom_kill: ensure we actually kill all tasks  sharing the same mm Oleg Nesterov <oleg@redhat.com> - 2015-09-29 16:30 +0200
  [PATCH -mm 3/3] mm/oom_kill: fix the wrong task->mm == mm checks in Oleg Nesterov <oleg@redhat.com> - 2015-09-29 16:30 +0200
    Re: [PATCH -mm 3/3] mm/oom_kill: fix the wrong task->mm == mm checks  in David Rientjes <rientjes@google.com> - 2015-09-30 00:50 +0200
      Re: [PATCH -mm 3/3] mm/oom_kill: fix the wrong task->mm == mm  checks in Oleg Nesterov <oleg@redhat.com> - 2015-09-30 16:00 +0200
    Re: [PATCH -mm 3/3] mm/oom_kill: fix the wrong task->mm == mm checks in Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2015-09-30 04:20 +0200
      Re: [PATCH -mm 3/3] mm/oom_kill: fix the wrong task->mm == mm  checks in Oleg Nesterov <oleg@redhat.com> - 2015-09-30 16:10 +0200
  [PATCH -mm 2/3] mm/oom_kill: cleanup the "kill sharing same memory" Oleg Nesterov <oleg@redhat.com> - 2015-09-29 16:30 +0200
    Re: [PATCH -mm 2/3] mm/oom_kill: cleanup the "kill sharing same  memory" David Rientjes <rientjes@google.com> - 2015-09-30 00:40 +0200
      Re: [PATCH -mm 2/3] mm/oom_kill: cleanup the "kill sharing same  memory" Oleg Nesterov <oleg@redhat.com> - 2015-09-30 16:00 +0200
  [PATCH -mm v2 0/3] mm/oom_kill: ensure we actually kill all tasks  sharing the same mm Oleg Nesterov <oleg@redhat.com> - 2015-09-30 20:30 +0200

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