linux-kernel - Cgroup hung system with rt patch, tested under 4.4.32/4.4.66/4.9.30

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Date:   Mon, 5 Jun 2017 12:03:44 +0800
From:   Journey Journey <journeywang123@...il.com>
To:     linux-kernel@...r.kernel.org
Subject: Cgroup hung system with rt patch, tested under 4.4.32/4.4.66/4.9.30

Hi RT Devs,

I enabled cpu/cpuacct/cpuset/devices/freezer subsystems in cgroup.

Attach serveral thread ids to these systems' tasks file frequently
last 4 or 5 hours(start process,  echo thread ids to tasks, stop
process). The system will hung, no response to user keyboard input.
Through I have enabled kdmp, but this scenario didn't trigger kdump.

Pls help.

Thanks