[PATCH 0/4] proc: deuglify task_state()

[Oleg Nesterov]

Hello.

I tried to optimize the usage of tasklist_lock in exit_notify() paths
but found the bug which should be fixed first: the EXIT_DEAD setting
in reparent_leader() can break the task_ppid_nr_ns()-like code and
ptrace_parent().

I am still thinking about the "right" fix, but whatever we do we need
to cleanup these users, probably before the fix.

One particular user is task_state(), but it also asks for other off-
topic cleanups which I believe make sense anyway, lets do this first.

Oleg.

 fs/proc/array.c |   47 ++++++++++++++++++++++-------------------------
 1 files changed, 22 insertions(+), 25 deletions(-)

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