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SubjectZombie stuck in zap_pid_ns_processes()
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Hello,

We are setting up a container using a CLONE_NEWNS linux namespace.
Previously we used the 3.4.4 kernel, which worked fine. After I
upgraded i also experienced races in netlink, which has been resolved
by placing a monitor around the namespace setup. When we upgraded to
Linux 3.8.0 however our init processes does not get reaped when the
namespace is killed and lingers as zombie process under the global
init.

The init has multiple threads when running and two remain in the
zombie. One of them is hung in zap_pid_ns_processes() and has been set
uninterruptible. The other one, which has Tgid=PID, is still in
do_exit().

--
Caj Larsson, Omnicloud


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