[Devel] Re: [PATCH 11/11] sysfs: user namespaces: fix bug with clone(CLONE_NEWUSER) with fairsched

[Eric W. Biederman]

"Serge E. Hallyn" <serue at us.ibm.com> writes:

> Except the sysfs mount holds no refcount on the userns.  So as long as we
> do the ida tagging as you suggested in your response to patch 6, there
> should be no reference to the user_ns left in sysfs code.
>
> The extra reference in patch #9 is for a light ref on the network
> namespace.  I'm still not sure that needs to be there, since if the
> network namespace goes away, it will properly unregister its sysfs
> mounts.  Eric, Benjamin, I really don't see any use for the hold_net()
> from sysfs.  What is it doing?

Mostly just being a sanity check.  We can remove that if it easier.

Eric
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