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pids controller fails to track zombie processes

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  pids controller fails to track zombie processes Tejun Heo <tj@kernel.org> - 2015-10-05 20:10 +0200
    Re: pids controller fails to track zombie processes Aleksa Sarai <cyphar@cyphar.com> - 2015-10-05 20:50 +0200

#1239814 — pids controller fails to track zombie processes

Hello, Aleksa.

I noticed that the pids controller is uncharging from the task exit
path; however, this isn't correct as zombie processes can linger on
way after exit while holding pids.  I can't think of a good solution
right now.  I'll write again when I know more.

Thanks.

-- 
tejun
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#1239840

Hi Tejun,

> I noticed that the pids controller is uncharging from the task exit
> path; however, this isn't correct as zombie processes can linger on
> way after exit while holding pids.

Maybe try adding a callback on the wait() path and remove the exit()
callbacks for the controller? But I'm not sure if that's safe (can we
even call task_get_css() on a task that's being waited on?).

-- 
Aleksa Sarai (cyphar)
www.cyphar.com
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